Housing for Mac-Pro.

Nobody has and nobody is likely to do so. It would be a huge undertaking with plenty of custom fabrication. It isn't like a standard motherboard that you can buy an external case for or even buy parts for. With a PC you can mix and match a huge variety of parts and fit them into many configurations but not so with a Mac Pro. I'd love to see somebody fabricate a creative new enclosure for the entire unit - people always amaze me with their dedication to solving this kind of thing. Post a pic when you have one. 🙂