+1 on Crutchfield as well, I used them to completely build out my 91 Olds Custom Cruiser.
Quick Question though: when throwing in some speakers in the Mustang did most of you disconnect the battery or is that not necessarily? I am afraid I may trip an airbag if I do not. But if I do, wont I have to reset the power windows?
2013 GT Base GHIG Track Pack + Recaros + GT500 AxleBacks + Boss 302 Tranny Cooler + Ford Racing Pro-Calibration