I've purchased numerous suppressors from Dunaway Custom Arms in Forest Lake and have no complaints. Since I moved further west though, I've been considering making a purchase from Total Defense in Ramsey (right off of HWY 47, just north of Anoka). Since I've had such good luck with Dunaway though, I may just stick with doing the 60 minute drive over there, even though Total Defense is only 10 minutes from home.
*Note: Dunaway does not have a range, so no conjugals. I despise the noise of indoor ranges, so that isn't a concern to me. To others it may, though. Total Defense does have an indoor range, but not sure if they allow conjugals or not.