I've compiled a list of various sources for aftermarket parts for our cars.  If anyone comes across a site i did not mention, please post up. I will try to keep this list updated.

Tearstone Performance 3G Performance Parts

Sport Compact Customs Unique and Custom Fabrication + Parts for your 3G Eclipse

http://www.deyemeracing.com soild/firm motor mounts

http://www.tialsport.com wastegates BOV's and more.

http://www.turboxs.com BOV's boost controllers.

http://www.summitracing.com again not much for our cars but they do have plug wires etc...

http://www.roadraceengineering.com/ good info and some hard to find parts from the 2G that will work on our cars. Not to mention a ton of stuff for the 3g as well. 

http://www.titanmotorsports.com Gauges

in regards to turbo's..

I own a 2.4 gs 04. ive thought about stickig a turbo under the hood but every corner i go around a find a guy telling me not to do it due to the fact that the 2.4 cant handle the boost and will blow.. any idea as to what it is that i should do?.. i want the boost and added acceleration.. just dont wanna loose the motor in the process

Yeah. The stock internals and ports can't necessarily hold the boost. That's why you mod them. But if you were to turbo one Elcipse, it'd be more logical to do it to the four cylinder than the six. Only because it has more room and more potential.

http://www.car-part.com posted list of graded used parts at comprehensive prices that they will ship to you.

http://www.uneedapart.com specify a used part whether it be stock or after market part you need and they will try to find it for you, and they do it for free!!!