That's the same camera as I have. I bought mine from here:
REAR VIEW CAMERA NIGHT VISION WATERPROOF NEW FOR CARS (Some of these have a set of green line superimposed on the image trying to help with perspective...)
6 inch standalone headrest car lcd tft monitor screen
Annoyingly, they make you email them for a price on the monitor -- I paid $56 or so, if I recall correctly.
Great to hear the encouraging improvements on the road, Jim. It really can't but help...