WHO can shorten a C-Body axle housing?

I can’t believe that not one machine shop in my area will shorten an axle housing. They all reacted like it was the worst request ever. Even a few suspension only specialty shops balked.
Can you send a whole housing to Dr. Diff or Moser for shortening? It’s a donor Newport’s C-body 8 3/4 for my 67 Dart’s big block conversion.