most of the T's that aren't band T-s.. the Jaws shirts get worn every day, practically, but I rarely wear band T's.. I still pretty much weigh what I did back then, so not an issue, size-wise..
If you're looking for vintage band T's the first place I'd hit is ebay.. maybe etsy after that.. there are places online that sell vintage T shirts and all kinds of new styles and whatnot, so I don't think you'll have trouble finding what you want.. If you have a list of bands etc I could probably help find some..
Friendship is like peeing your pants.. Everybody can see it, but only you can feel the warmth..