Jumping with Joy

My brother just gave me his old sound system. Sooooo friggen stoked. Yeah it may be nothing special (Aiwa headunit, Sony Xplode Amp, Sony Xplode 15" Sub) but its free and my blown out stock stereo can now hit the dirt. Where can I find the headunit interfaces or whatever (the plastic around it.

Thanks, Dan

I got my trim kit and wiring harness from crutchfield.com.

http://tahoeforum.com/showthread.php?t=6931