I just replaced the head unit in my 2006 Limited with JBL 10 speaker system with the Pioneer AVH-P4200DVD (has the USB on the back of the unit). To replace the head unit and keep your JBL system, you'll need the PAC TATO ($75 at Crutchfield) and the PAC Steering Wheel Interface that's...
I ordered my HID kit (4300K) a couple weeks ago and just got it today - it was backordered. I got an email saying it was backordered about a week after I ordered it. This may be what the issue is - I'd give them a call.
