I've used Ye Old Wheel Shop in the past for my 3 piece SSRs before. They do good work but do get backup sometimes with all the wheels they fix. You have to drop them off and pick them up in a 1 - 4 weeks. They guys are recommended by lots of BMW, Audi, and Porsche guys.
Now I just buy Reps and replace them if one gets really bent. A small crack is easy to fix, bent lips are harder but can be done. Polished lips are nearly impossible because they have to strip the clearcoat off to fix the polished lip and then you have to buff and polish the lip all the time because it has no more clearcoat.