SL/R230: Backup Camera



I'm getting ready to order one of the Chinese head units to replace my MB one. I've considered all the pros and cons and I'm happy with my choice.
One of the options is to add a backup camera since the receiving unit is already built in. I've seen aftermarket ones on other cars which actually are part light and part camera but are mounted where the license plate light lens used to be. My question is, has anyone on here done this before? I'm having a hard time finding one that will fit and I don't want to drill holes.
Thanks.



Diablo, I'm going to put the wireless send and receive unit on it so I don't have to run the wires all the way through. I'm looking for something like one of these that fits in the rear license plate lens. Part light, part camera. Problem is, I've been struggling with actual dimensions. I've measured the existing but it's had to tell to the mm what the exact size is...
http://www.ebay.com/itm/Car-Parking-Rear-View-Reverse-Camera-CAM-Mercedes-Benz-B-C-E-CLS-Class-Vito-/271214012690?pt=US_Rear_View_Monitors_Cams_Kits&hash=item3f259d6912



