I think this is what Spada has been working on.
http://www.autoblog.it/post/8000/spa...foto-ufficiali
current Corvette base
I agree the doors are probably different, the top of the front fender looks remarkably similar to the standard car but I suppose this was intentional.
I don't know either what BMW was trying to achieve with that MM concept, but an attractive car wasn't one of them.