always something else!

as im fighting my way thru the endevor of body work, of course something else pops up! i pulled the rear seat and side panels to get behind some dents i need to fix, i find my left rear window is missing some rollers(nylon roller?) it fits into a track that curves back and down. (2 door hard top) anybody know who carries parts, or where to find parts - rebuild kits - or anything that i can use to fix this problem?