I think the problem is the general lumping of all the vax available out there to be using or tested with fetal cells. This is where individual prudence is needed. On scenario #2, what if the recipient of the cornea does not know the source or was told it was taken from a morally acceptable source?
This doesn't seem to be "neoSSPX sellout" issue but on the Thomistic application of material vs formal, passive vs active cooperation in the act of abortion. Didn't the sedevacantist Bishop Sanborn also enunciated on this topic a couple of months ago?
No, this is absolutely a sellout. During his keynote speech, he didn't mention the term "abortion" a single time ... but he did allude to it, and, guess what, he tied it to the ANTI-jab people. It was downright diabolical.
As for his articulation of the material cooperation, he never actually used the term or defined it, but gave a example, using the cornea situation, but the example was absurd and had absolutely no relation to what's actually taking place here.
As for the recipient "not knowing", well, that excuses from personal culpability but has no bearing whatsoever on the objective morality of the act. That's true of any moral act, where it you don't know, you're subjectively not guilty.