http://www.yearwood.com/store/products_details.php?cat=48&cp=0&s=&id=GTP3
I found this on a hotrod accesories supplier. Think they are really cool and not to costly either. I know i wouldnt have mine wired up2 the ingnition switch I would have a seperate interface aswell for going through cameras lol

Looks good that. tis a good idea. I'd wire it up the same too - to the ignition switch.

lol, a bit pricey, but would be something to show off, I certainly have not seen one in normal use before, only on the movies hehe.