Interior parts are easy to find at any junkyard that has a couple proteges in it. Both of the ones near me usually have at least 5 or so at a time.
As far as performance parts, there are plenty of threads on that topic. You can delete the VTCS flaps, flash the ECU to the MP3 tune, lighter flywheel/crank pulley, motor mounts, lighter wheels, FSZE intake/Corksport exhaust cams, adjustable cam gears, CAI/RAI, header, high flow cat. A tune up will always help make the most power if you haven't done one recently.
So what's up guys! Little issue here, I have a squeaky belt, but I can't find out the problem. I've checked the belt itself, but it's brand new, and there doesn't seem to be any wobble on the belt as it goes through the pulleys. The sound seems to be conning from what I believe is the AC thing.