Hi Morton,
Any jobbing engineer or toolmaker with a vertical mill could do this for you. Quotes will probably vary a lot depending on whether they do actually want your business at the time. There are several reasons why a business may not wish to quote just then.
The cutter that will be used is a standard one for the job, 45 deg or 60 deg.,
http://www.littlemachineshop.com/pro...ProductID=2904
so the quote will be for material, setup, and labour.
Look up General Engineers or Toolmakers in your district. They will all know one another in a given locality, so if one does not want the work just then, you can ask for a suggestion as to who might do. You will need to supply a working drawing.
Cheers