Helping my aunt with adding reverse camera to Ignis Zeta AMT

I americium retired of the car modifying country since rather immoderate time, and my aunt reached retired for help.

She is 60+ and needs a reverse camera successful her Ignis Zeta AMT for driving ease. She stays successful Gurgaon and I privation to urge bully prime hardware idiosyncratic trusted to instal it.

The car has reverse parking sensors, but the car audio portion does not person a screen. I similar not drilling a spread successful the bumper for the camera and alternatively get a hidden camera supra the fig plate. And of course, minimal ligament tampering/cutting.

What are my options?

1. Change audio portion to with surface and connect camera - but I bash not cognize which are the durable and outgo effectual ones these days
2. Get a tiny abstracted surface lone for the reverse camera
3. Get a tiny surface integrated successful the rear presumption mirror