You might think of talking to Jimmy's Transmissons out of Mundelein, IL. He rebuilt my trans for me a few years back, and I have nothing but praise for the job he did! I have not had a single problem with the trans since the reuild, and it shifts like a beast! Kind of hurts the head when you have a hangover though!
His info is on the vendors page at GNTtype.org. Here's his phone number: 847-949-7507.
I don't know what he would say about anodizing. In my opinion there has got to be a plating shop somewhere in the area of his shop that could anodize the disasembled unit. Anodizing would not be a problem in my opinion since the case is all alluminum.
Hope this helps. It would save you shipping issues! He's pretty close to Casper's so you could kill two birds with on stone if you needed anything from John!