This is the one I am looking at for the very same purpose. If you don't open it...it acts just like a radio. It has a slot loading cd/dvd player that will play through the screen without the need for a PC. It will then act as a cd/dvd drive when the PC is turned on. The PC is viewed by switching the video source, and it has a backup-cam port with auto sensing I believe.
Not a ton of reviews out, and I can't seem to find anything else like it. Let me know what you come across! I love the alpine idea, just a damn shame its dead