I find the dealerships usually carry excellent video multi media components but charge higher prices.
I have a Savv (www.savv.com
) 10.2 inch motorized unit with wireless headphones (screen and dvd player with SD memory card input, usb, and a variety of other inputs like video game joysticks, etc.).
The motorized overhead Savv unit works wonderfully and is very useful while driving the kids around town to camping, etc. On my end, it is worth the investment. Also adds value to the vehicle, and uses very little car battery power.
I had the OEM Mopar 7Inch, with in dash dvd player. But replaced it with the Savv unit. The bigger size and better quality is great.
I have seen Savv screens. I would suggest 10 inch size (at the largest). Their overhead monitor will hook up nicely.
If not the Savv, there are other comparable units that a mobile audio video shop will have. The smaller local shops is where I suggest you go, rather than the big box stores since install with your OEM unit may be a bit tricky.