i would say check some junk yards, some of the better will pull seats from cars/trucks so people can buy them. my friend got some acura integra buckets and welded them to his old brackets (used acura's and chevy) they look good, just took some time.
any GM bucket will fit, except baretta. Use the seat brackets off the old seats & bolt the new one onto them. If it's a 2 door or a pick up, get the seats from a two door car so the seat back can fold forward.:bash: