I just got back from the dealer, they used a third party kit to add the backup camera. This is the one they used to enable the backup camera -> http://www.navtv.com/product/207/myf...eShowProduct=1
and this seems to be the camera itself -> http://www.navtv.com/product/185/cam...eShowProduct=1
(I have to double check this, it might just look alike). Seems to work fine, haven't had some time to really test it yet.
EDIT: that's definitely the camera they used.