Bill,
You being a handy guy, I'd suggest that you first put mold release on all the metal (I use an aerosol because it's easy and applies evenly), then mold the existing stock to the metal using Devcon Aluminum or Steel epoxy or the Brownells equivalent. You might have to route out some wood in the inlet area to insure the bedding material has some area to get into.
Once this is done, I glue on blocks of wood (often pine or whatever's laying around) to build up LOP or comb dimensions. On the larger areas like the comb, I use Bondo to fair and contour it. I've used Bondo to mold to the barrels to form the barrel channels in a forend pattern also.
I think you're getting the picture on this. Once you're happy with the pattern, the stock machiner or stock maker will have a target to shoot to and no excuses on dimensions. Even Wenig should be happy with this type of pattern.
For someone to machine the wood, I've used several duplicating craftsmen, but could not recommend any of them.
