UPDATE!!!!!!
Ok so why the hell didn't anyone mention you can buy a perfect body replica from flea????????
Sure it's expensive, but it would give the unique characteristics of the head grille that has been discussed in depth on this thread.... hmmmm?
Here's the link...http://shop.flea-microphones.com/index.php?page=productDetail&category=Mechanical+kits+%26+Parts&prNum=55&group=M50
Also there is a capsule which could be obtained here which is pretty similar... about as close as we could get... Though it comes with a useless U47 head, which can be discarded or used as a spare for your U47 (if you are a lucky bastard and own one!)
http://shop.flea-microphones.com/index.php?page=productDetail&category=Microphones&prNum=29
So with those two impossible to obtain items in place (at a great cost)... What's next? The tube and transformer... Which I am doing research on as we speak.
-Grant