I need to buy a camera at the end of the month when i collect my car, I "think" at the moment I will have a Nextbase 522 and fit it myself (it has a polarising filter to stop a lot of the reflections from the screen). Apparently there is a fuse box at the side of the dash to get power and the camera comes with a spatula for poking the wire behind the trim. You can also get a rearview camera that fits to the front cam. Not a perfect answer for the rear facing cam but no wiring to be done.