82 Tercel Parts needed

I am needing a plethora of parts for my 82 Tercel. Anybody have any ideas where I can get those in the Great Plains area? I'm needing bucket seats, door handles, fuel gage sender, etc. I have tried some places in CA and did get a heater core. The dealer wants $50 apiece for the door handles (inside). I said no thanks, I'm NOT putting your kids through college.