Clark in North Louisiana does "combat" trigger work. They offer target trigger work as well. If I was a double action kind of guy, I'd probably send my stuff to them. I'm pretty sure Jim Clark's son is still running the place. This is also the place where Jerry Miculek used to live and work. I think he was married to Jim Clark's daughter. The only DA I have seen that was worked on there had a target trigger job. It was something special, but required soft primers to be absolutely reliable. If you're old enough, you probably know about the great 1911's that came through their shop.
Good luck, I hope this helps.