John,
I have a Alpine CVA-1003 in the original box that I took out of my 2002 Patriot. It still works fine but the pop-up screen does not close fully on its own. Anyway, to the other issue of replacing this unit. Many others have faced the same situation. IMHO, all pop-up screens in singe DIN chassis style radio/monitors fail for many reasons. After three (3) replacements, I now have just a standard single DIN AM/FM w/remote (for the DW) and a seperate monitor for the rear camera. I think this is the best solution (and cheapest) for your problem.
BTW, you are welcome to my CVA-1003 for the cost of shipping....
Karl