I have a keyhole mounted camera that i want to use as a rear-view camera when i put the car in reverse. I'm looking for video switchers on ebay but i dunno how to search it. I type in "car video switcher" or "video switcher reverse" and i come up with nil. Does anyone have any suggestions?

Keep in mind, i'll need a video switcher w/ 2 inputs and one output w/ a reverse function. I'm currently running a Pioneer HU DVD/MP3/CD w/ a microvision screen.

-Thanks