Hell, just take the seats out of your dad's Rubicon. Personally, I'd probably try to get late model TJ seats since they are pretty nice. Old Camaro seats were popular but that was back a few years. Anything from the 80's or even the early 90's is gonna smell and probably be in sad shape. The other problem is that most seats these day's are designed for large people. Nothing against them but when you want to drive aggressively a park bench isn't the best seat. The other problem is if you have a center console. Most seats are too wide to use with a large console. So keep that in mind. If you're not that picky, then you can go with Cavalier/Sunfire seats or probably Cobalt. Some people have used Mustang seats but they're on the wide side.
If I was looking for OE seats, I'd probably look for an Evo with Recaro's to snag. Maybe STi seats but those are a bit wider and flatter even though they're Recaro's as well but they're not going to be cheap either. Hell, jsut buy from Mastercrafts and put it on dad's CC.