iPod

Hi all, I'm new to this forum, just got my hands on a 2007 es350. I'm looking to install the navigation system with the rear camera. Anyone have any tips of what parts I need to find and or if anyone has any of the needed parts for me to do this upgrade. I want to use Lexus stock parts if possible.

I've checked eBay and the total looks like it would cost about 1,500. ~1,200 for the cluster with navi and disc changer, and another ~300 for the rear camera.