Yes, Witch Hunter Performance (
www.witchhunter.com) will clean your fuel injectors and replace gaskets. They measure flow before and after cleaning. You remove your injectors from the fuel rail, pack them carefully and send them off. Witch Hunter performs their service, promptly, and sends them back in the same packaging you used to send them in. From the time I sent the injectors to the time I had them back in my hands took 1 week.
Sorry to resurrect the very old post, but I was just getting ready to post a new post for this specific question.
Attached are my results: