Well nomatter who you go to, it's going to cost you an arm and a leg. I know some custom audio shops around here will put anything you want in there if you give them the parts. My suggestion is find some small but not too small car audio shop and ask if they would be willing to fabricate the screen into the dash.
Then take the PC to a little machine shop and ask someone to build a mini case for you to screw into the mounting brackets in your car behind the console. Some internet sites will accept CAD drawings and your money and mail you a piece that you can just put together yourself.
Really though, doesn't that take the fun away???