I have used Kameraklinik recently. They CLA'd my Hexar AF competently (cleaned AF system, replaced camera top shell w/ LCD and VF eyepiece, solved shutter switch problem and checked shutter speeds). Work quality was good, communication required some initiative on my part (see below), pricing - well I guess it was appropriate considering that I was having a collectors item brought back up to speed.
They have their own stock of Konica spares. It appears they bought up all Konica/Minolta spares supplies when the KM camera operation was closed down in Germany! They claim they had to move their office to have more room for massively increased spares stock.
A word of caution: They are not very good at answering emails. If you want to keep track of your camera's repair status, you will need to phone these guys. It helps if you speak German.
FujiFilm X100, Fuji X-Pro 1, Konica Hexar RF, Hexanon & CV glass & Nikon Coolscan V ... plus a big, bad DSLR
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