Where'd you get 232hp from? That's stock turbo specs, n/a is just under 200hp and even less torque. The best place is obviously going to be local junkyards, you never want to buy body parts new for this car, toyota charges a small fortune for anything over 5lbs
You could also try the
www.supraforums.com "MK3 parts for sale" section, usually always someone parting out a car their. Also if your ever going to buy anything from a toyota dealership new, then do it from Jay Marks Toyota, he's got the best prices on new toyota parts (even if they're still high)
http://www.toyotaworld.com . Now that you've screwed up hopefully you'll wise-up and be respectfull of speedlimits and laws, they are there for a reason, and your car even if it is a n/a, it can still get you into a lot of trouble. Either way welcome to the Supra community, by the way where are you in GA? I'm right outside Augusta if your not too far away.