'85 is a bit far back for dealer OEM parts, though you might get lucky. High prices there, as usual. Or somebody here might be parting one out, too. Wait and see for that...
Otherwise your best bet is Car-Part.com--Used Auto Parts Market
Search for a common part there (transmission, door, etc) and you might locate a corpse near you on a recycler's lot. Great way to visit the corpse and deal for everything you might want, now or in the future. If nearby, drive there and check it out in person
Make your best deal on a buncha stuff, package-deal style