What brand /model camera is in place now?
Furunos I'm familiar with (TZ or Navnet) have standard analog rca video input. Nothing special there.
Is your existing camera is a higher end unit?
See one internet supplier that links a Sionyx as an accessory.
This is a completely different level of quality and exponentially more expensive, proprietary CMOS and it's own installation / application software.
That may be where the image reversing capability you are seeking resides.