Digital WorldWide used to sell an in-dash flip-out housing for Lilliput 7" screens. I believe it also worked with Xenarc 7" screens, as well.
I checked his site and don't see it available any more, although you might try contacting him.
For future reference, you're likely to get a quicker answer by searching the forums rather than waiting less than 8 hours in the middle of the night for a response.
Have you looked in the FAQ yet?
How about the Wiki?
Under normal circumstances, a signature would go here.