If your car or van has a screen, it can almost certainly show a reversing camera. We add cameras to factory head units, to aftermarket Alpine and Pioneer units, and — where there is no screen at all — to a replacement rear-view mirror with a display built in.
Vans and high-sided vehicles benefit most: a number-plate-mounted camera shows the whole area behind the doors, which no mirror can. We do a lot of this work for local traders and fleets as well as private owners, and can fit a camera and parking sensors in the same visit.
Tell us the vehicle and what screen it has, and we'll come back with a price.