I'm going to visit a Luthier in Munich on the 12th of April, just got in contact with him. His name is Martin Schleske (
www.schleske.de) and he appears to have a good name in germany and beyond. My teacher also recommended a violin maker in switzerland, but I'm not sure I remember hi name correctly so I'll have to aks my teacher again before I can contact that one.
The Schleske violins are around 20000 Euro and are custom made. I can try two of his previously made instruments and then decide whether I'd like him to build one for me. After he finishes that (no idea how long that takes, I've asked him by mail about that and should hear from him on Monday or Tuesday) I can decide during the time of two weeks whether I'd like to keep the instrument or give it back.