Mike @ TopHat is very knowledgeable about AE86s, but he's mostly into Nissans nowadays.
http://tophatperformance.com/

Pull-A-Part is a good local source for random interior parts.

Club4AG is definitely a good forum for parts you'll want, but the only thing is is that 80% of the people on there are in Cali. and it takes a little longer to get parts.

If you're thinking about getting some TRD/OEM parts, go to Toyota Mall of Georgia and ask for Russ. He has a clean 4AGZE w/ a Megasquirt he made himself. He can probably give you a lot of info.

Good luck on your project, and yes I can't think of how many times I've had to use a good ole hammer to get some crap out of my AE86.

Oh yeah, make sure you always have a can of PB Blaster around and use some anti-seize for bolts.