If your not looking for new new seats... try salvage yards, they are gunna be your best bet. They might need some cleaning, but usually u can find a pretty good deal there. I think i paid like 150 bucks for seats when i replaced the ones in my 97 with ones from a 2000. Try... www.car-part.com
That will let u search salvage yards that have there inventory online, u might get in luck.