While that's an awesome idea and all...those Mac Minis are small, but not that small. You'd need a large area behind the dash to run something like that. I know my 4Runner couldn't take that.
Here's a site: http://www.spdhardware.com/
While, I can't recommend these people (as I have yet to buy anything from them), they may be a step in a good direction. I found this site while looking for hinges when I was designing my cargo box.
-Beau