http://www.scribd.com/doc/211357956/Sources-of-Baptism-of-Blood-Baptism-of-DesireThere's a link with hundreds of sources throughout the entire history of the Church, from the beginning until modern day, teaching BOD. And here is an excerpt:
St. Bernard of Clairveaux, Doctor of the Church, writing to St. Hugo: (bears mentioning that St. Hugo did not rebuke St. Bernard for his "liberal opinion," [some may even say heresy as he addresses BOD proper, rather than BOB] but rather in turn taught the same thing.)
[He begins by quoting Ss. Augustine & Cyprian] ...Notice also that, when the Savior said “whoever believes and is baptized will be saved,” He cautiously and alertly did not repeat the phrase “who was not baptized,” but only “whoever does not believe will be condemned” (Mk. 16:16). This intimated that sometimes faith alone would suffice for salvation, and that without it, nothing would be sufficient. For this reason, even if it is granted that martyrdom can take the place of baptism, it is clearly not the penalty which does this, but faith itself. For without faith what is martyrdom, if not a penalty? It is faith’s doing that martyrdom can without any doubt be considered the equivalent of baptism. Would not faith be very sickly and weak in itself, if what it can give to another, it cannot obtain by itself? To be sure, to pour out one’s blood for Christ is an indubitable proof of great faith but to men, not to God. But what if God, who needs to perform no experiments to test for what He wants, saw great faith in the heart of someone dying in peace, not put to the question by martyrdom, but suitable for martyrdom nevertheless? If he remembers that he has not yet received the sacrament and sorrowfully and repentantly asks for it with all his heart, but cannot receive it because his death comes too quickly, will God damn his faithful one? Will He damn, I ask, a person who is even prepared to die for Him? Paul says: “No one can say Jesus is Lord, except in the Holy Ghost” (I Cor. 12:3). Will we say that such a one, who at the moment of death not only invokes the Lord Jesus, but asks for the sacrament with his every longing, either does not speak in the Holy Ghost, so that the Apostle was mistaken, or is damned even though he has the Holy Ghost? He has the Savior dwelling in his heart by faith (Eph 3:17) and in his mouth by confession (Rom 10:10); will he then be damned with the Savior? Certainly if martyrdom obtains its prerogative only by the merit of faith, so that it is safely and singularly accepted in the place of baptism, I do not see why faith itself cannot with equal cause and without martyrdom be just as great in God’s eyes, who knows of it without the proof of martyrdom. I would say it can be just as great as far as obtaining salvation goes, but it is not as great in regard to the accuмulation of merit, in which martyrdom surely surpasses it. We read: “Everyone who hates his brother is a murderer” (I Jn. 3:15); and again, “Whoever looks at a woman lustfully has already committed adultery with her in his heart” (Mt. 5:28). How could it be more evident that the wish is considered the equivalent of the deed, when necessity excludes the deed? That is, unless one thinks that God, who is love, would impute us the evil deeds of the will and not the good, and that the merciful and compassionate Lord is more ready to punish than to reward. Suppose someone who is at the point of death happens to remember that he is bound by a debt to another. If he lacks the means to pay it, he is still believed to obtain pardon solely by repentance and contrition of heart, and so he is not damned on account of it. In the same way, faith alone and turning the mind to God, without the spilling of blood or the pouring of water, doubtlessly bring salvation to one who has the will but not the way because death intervenes to be baptized. And just as in the former case no repentance remits sin if, when he can, he does not restore what he owes, so in the latter faith is of no avail, if, when he can, he does not receive the sacrament. He is shown not to have perfect faith, if he neglects to do so. True and full faith complies with all the commandments; this particular commandment is the foremost of them all. Rightly, then, anyone who refuses to obey will be thought of not as faithful, but as rebellious and disdainful. How can someone be faithful, if he holds a sacrament of God in contempt?
The Feeneyites take well to read the entire passage, especially coming unto the end of it and witnessing St. Bernard both teach BOD, and simultaneously retain the deepest regard for water baptism (How can someone be faithful if he holds a sacrament of God in contempt?).
Likely, it is blinding pride which prevents the intellect from assenting to the Church's teaching on this matter-- it isn't difficult for the mind to grasp EENS and BOD; no, there is a perversion of will at play here. Perhaps the holy and sublime words of St. Bernard can chisel away at hardened hearts.
Incidentally, I know that the person who compiled the hundred+ sources on BOD found some through Richard Ibranyi. Ibranyi has written "books" against the "heresies" of Doctors of the Church, including St. Thomas Aquinas. This is the end which awaits the Feeneyite. The embryonic Feeneyite is content to merely dismiss BOD as "tolerated" (though he personally thinks it's wrong, maybe even heretical) but the fully developed Feeneyite does what Ibranyi does. Y'all have your plane tickets ready for New Mexico?