If you want to stay (relatively) in your area, I'd research and seriously consider this shop: LSG, Mfg|Gun Parts|Warranty|Gunsmithing

He's on the short list of shops S&W uses for warranty repair -- for decades -- and is also a full gunsmith outfit.

I prefer not to ship my guns when I can avoid it, and many a time have made pleasant day trips out of visiting a respected gunsmith if they were a halfway reasonable drive from me.

Alternately, and at least staying in the state, Teddy Jacobson over in Sugar Land is legendary for the quality of his work (and difficult personality, if true): Actions By T - Teddy Jacobson Pistolsmith