The one I purchased was only $15 on Amazon, it got 4 out of 5 stars, but I haven't finished my install yet, so don't have a recommendation. Here is the link: Amazon.com: Koolertron Rear View License Plate Backup CMOS Camera: Car Electronics
Don't know if you have a solution or not, but there is a violet/white lead out of the Power Cord on the Avic-Z130BT that will detect the reverse signal and display the rear-view camera picture on your HU...the brown RCA from the RCA Connector will make the switch. I'm in the process of adding...