Sorry I got back late on this thread. Sent it in to Virgil Tripp @ Tripp Research. His business was hard-chrome work, but he also sells 1911 mags for 10mms & .45s and offers pistolsmithing services.

This was about 3-yrs ago. If I recall correctly, it was $300 or so for the whole gun. They'll also do just the slide or frame.