The Church, historically, taught the damnation of all non-Catholics.
Those outside the Church, when they die, are damned. This is NOT equal to what you said above. You think it is...but it is not.
If they are inside the Church when they die, then they are Catholic.
They die WITHIN the Church, with true supernatural Faith...nowhere does it say they became MEMBERS before their death. If someone dies without supernatural Faith, they are damned. If they die within the Church, they can be saved.
It they have explicit faith in Jesus Christ, the vow for sacramental Baptism, and submission to the Roman Pontiff, sure, then they are Catholic, every bit as you or me (and yes, I do profess all those things), and they will go straight from being part of the Church Militant to the Church Suffering, as most of us (myself included) will end-up, but like us (I hope!), they will be part of the Church Triumphant, eventually. So, they are every bit as members of the One True Church as anybody who has the name 'Catholic.'
On the other hand, if they are lacking one or more of the above attributes, then, no, I would say, based upon the Tradition of the Church, they are lost for Eternity. As always, salutary repentance is an option. There is, however, only one Heaven, not Buddhist, not Hindu, not Islamic, and not Jєωιѕн, but only one, where Jesus Christ, the One and Only Son of God, Lord of Lords, King of Kings, will rule and reigneth forever and forever.
We've been through this enough, so the last word is (if you want it) yours. This will be my last post on this topic for quite some time. Sometimes, people just have to "agree to disagree."