Backup Camera for Model A with 6V Positive Ground

[shew01]

Yeah, I know. "Real men don't need no stinkin' backup camera for a Model A. Just turn your head and look real good." However, there are convenience and safety factors with backup cameras nowadays.

Can anyone recommend a backup camera for a Model A with 6V positive ground? (I didn't find much when I searched this forum.) I'm assuming the camera would need to be wired to avoid EFI from the engine when the engine is running, but maybe not. Ideally, it would be great to see the camera output on my iPhone.