You might try Nuline also. Years ago I had Simmons do a M-12, I was thinking of having a M-12 12 gauge I have done and checked Simmons pricing. I cold blued it.....
When I lived in the STL area I heard of MWG but di not use them.
A guy that did a few things for me was Frank at F&D Guns in the STL area. Nice job, I prepped the guns and did other things for him to cut my costs. Friendship is an added value. You might see how much you could save by sanding and or prepping parts yourself.