Can't find an adapter for the stock backup camera

Replaced the hatch lid after an accident with one that had the stock camera. I've got an aftermarket headunit which I wired to an aftermarket camera (also smashed in the accident). I'd like to use my existing aftermarket wiring to connect to the stock camera in the replacement hatch lid. It's got a 4-pin connector. I need something that feeds it power and outputs video signal to RCA. Looking on Crutchfield, Amazon, etc. didn't really help.

Here's the connector: