yah man core supports are hard to find even for a dealer. Bodyshops can get them but its not gonna be cheap. Find a junker and cut it out, I think its easier to cut the entire thing out then drill the rivets and re-tac onto your truck.
may as well be in europe lol. i live in south mississippi. my truck was wrecked before I got it and the core support on the driver side is tweaked decently. i cant just cut it out and tack it up to what ive got but i guess i could cut it out and remove the spot welds once home.
anyone got one layin around i cant find anything but 89-93. how diff are those think i could mod to fit? would be nice theyre only 70 on ebay