Hi there,
So the 512GWRC has now no longer in production or sold by us. Regarding Rear Cameras there are 2 options:
1) I'd recommend using a separate Camera such as a 312GW or 122 on the rear windscreen. You will need a separate power supply and SD card as it will not connect to your 512GW, but can be used as a Camera facing rearwards. The prices are comparable with the Series 2 Rear Cams, and if you'd like to keep using your 512GW, is the most viable option.
2) If you upgrade to a Series 2 Camera, there are 3 different Series 2 Rear Cameras that are all compatible with the 322GW, 422GW, 522GW and 622GW. Unfortunately the Series 2 Rear Cameras will not work with any other devices apart from the ones I have listed above. These Rear Cams do not require separate powering or SD cards.
I hope this helps.
Regards,
Millie- Nextbase