Do a quick google for "Rollei & Hensel Service" in Bloomfield, NJ. I don't remember the name of the gentleman who runs it, but he was a long-time employee of Rollei, who used to be located just up the road. I had him do a re-build of my 6006 battery, which he did while I waited at a fair price. I can't compare their service with others, but they are listed on one of the Rollei sites as the last official 6000 series service site left in the U.S. Of course, they also service Rollei TLRs.