Sorry, Robert, no insult intended …
My own list of defects starts with the lumbar spine which every couple of years really gives me hell …
Of course, if your vertebrae are fixed you’ll have stopped to work as a contortionist and the idea of a camera-fed screen is more than self-evident.
I’ve spent maybe one night checking them out: You can fix the camera in the number plate frame, control and feed it with the power from the back up lights and use USB data transfer to the head unit.
DIN sized head units are available and perform as radio, navsat and camera screen. They are available with an extractable 7" screen and seem to perform quite well. The downside is that the mechanism will not protrude far enough to circumvene the lower dashboard edge on our cars. Pulling the entire head unit forward will foul the gear lever I suppose.
Good luck though
75 XJ6L 4.2 auto (UK spec)