There's a reason you haven't found anything... There's nothing to be found that matches your criteria.
All is not lost, however. Armen & the MP3Car store are your friends, my man.
You can get this monitor: http://www.mp3car.com/store/product_...products_id=44
and this housing: http://www.digitalww.com/IH002.htm
Then do the work yourself. Armen even has a handy guide available with pictures and everything.
The monitor is $260. The housing is $170. You're looking at $430 before shipping. Chances are you could find the monitor somewhere else for a cheaper price, but buying from the MP3Car store gives you a warm fuzzy feeling inside, similar to eating an unpeeled kiwi fruit that you microwaved first.
Realistically, though... When you get to that price point, you're damned close to what it would cost to buy a motorized touchscreen unit which wouldn't require any assembly on your part.