Thank you all for replies.
Similar to what John said, I found a guy here in Barcelona who repairs these cameras. If it is only CLA, the cost should be at about 90€, if there would be another problem, he'll call me. If I decide to not to repair the camera, the cost is 10€ for the review. I consider this prices quite good and the guy has 50 years of experience.
I know about Mark Hama, but being based in Europe, I had to look for some solution here.
I should have the camera back in one or two weeks, I'll let you know.