So I just went to the UPAP and pulled an Infinity Gold System amp out of a grand cherokee. I'm wondering where I should look to get the wiring harness for this amp. The harness attached to it at UPAP had been rigged really weirdly. Does anybody know where I could go to get another one? Also got two nice speakers while I was there. I plan on putting the new speakers up front and trying to find another set to put in the back doors. What kind of wiring would I need to do to run speakers in the back doors? just lookin to get a better sound system in the yeep. Also, while the door panels are off I planned on soundproofing the doors with spray foam, anybody done this before and have a brand they like or dislike?