The only stuff that was pure MDMA in high dosage has molly. I've had plenty of pure MDMA pressed pills but you needed like 5 of them over the night and they were 15 each so it made it not worth it at all. I've had Gs up hoes down rolls which have always been incredibly potent, sometime more than other times, but are definitely MDA.
I live in cali and I don't have a problem getting them, and if I go for a solid connect I can get some super stunners, like on the plateau for 5 to 7 hours, I have never come down after only 4 hours unless I never went up, ya know? Last ones I had that went hard were a red playboy and a red buddha. Anyways they probably aren't "extinct" but maybe you just need a solid source, not no bs loafer motherfuckers gettin' over on society.