Automotive camera systems

We are looking for a camera system to fill a gap in a niche market in the uk. The camera system should fill the following basic criteria, we will require both 12v and 24v systems, preferably wireless but not essential, weatherproof camera with wide angle lens and basic night vision, LCD screen not less than 3.5".
We are looking at importing in large numbers if we can find the right system at the right price.

Kind Regards
Kevin Rae