Tough to find some one that really knows DWs.
A couple of recommendations for you.
Check and see if there's a IHMSA Match or club in your area. If there is, someone's bound to have the name of a smith that knows DW's.
Another is to contact Novak Sights. They recommended a gentleman in Vermont that is supposed to work wonders. I talked with him but never followed through on the job. He seemed pretty knowledgeable. As this was 5 years ago, I don't even know if he's still around.
Another option is to start by ordering a Wolf spring kit and installing it yourself. This will lighten the action a bit but won't do much for any creep.
Take Care