I've used Kindermann in Toronto, Canada. Dead Link Removed Supposidly they bought out Leica's stocks of screw mount parts when they discontinued them. The techs are excellent, each have 30+ years of experience working on these cameras and do excellent work. As an advantage, it's cheaper to have the work done in Canada than Europe.
Going by memory, I think a complete CLA was $260 cdn, or about 190 euros.