racinstyle

I want to install a rear view camera for my 01 ls430 UL. I plan on tinting it pretty dark, and will be hard to see at night when I back up. Does the stock navi unit have a video input for a rear camera or do I need to buy one of those vais tech devises? Also, where is a good place to order a rear camera? I want one as close to stock as possible. Something like this one http://www.john2211.nl/Hybride_gebru...sBackupCam.pdf
Do any of you run a rear camera on your LS?