These unpriced wooden slip cases with leather lining and magnetic enclosures are designed and custom crafted by Rainer Spehl to fit 13-inch MacBooks or 15-inch MacBook Pros. Unfortunately, there is one problem with these - a tree has to be cut down to keep a computer safe.
While that's clearly a last-gen MacBook Pro pictured, I bet that Rainer will build the case to whatever dimensions you'd like. Money equals customization so as long as you have the money (unkwnown) then you'll be all set.
To get yourself one of these visit here. You'll also get to see some very nice pictures.