Workshop for timing belt change Alfa 147 in Rhein-Main – Anyone get a recommendation?

Hello together, with me are service work on and an appointment in a free workshop I already had. Now I was informed that the appointment can not be kept in time and I had to wait until mid-November. It has to be done: both timing belts with water pump as well as phase adjuster/repKit, valve cover seal, air filter and oil change. I have now certainly conducted 15 phone calls and find no free workshop, which can or wants to change the timing belt. is it also a small problem, since I have already bought a Conti timing belt set and should therefore always be installed with brought parts. Would someone have a recommendation for me in the Rhine-Main area, where is not immediately waved off at “Alfa” and install the also provided parts? Mainz, Wiesbaden, Frankfurt and surroundings, I thought. I would be very grateful and looking forward to news. LG Tanja