On the old forums, the FD15B bypass from Scosche had been discussed. However, there wasn't a place that was still selling it. I got mine directly from Scosche. $14.95 + $8 shipping makes it cheaper than the bypass from Crutchfield and there's no wiring! just plug and play. Install took about 5 minutes including removal of the factory amp and me replacing the contents of my glovebox.