Try the forums at http://www.toytowngermany.com/
Although it's more geared to expats living in Germany, it should be helpful for you since you go there often.
It used to be "Toy Town Munich" only, so you'll find much more info about MUC than about other cities.
Please remember that TT members don't like "hit and runs" (sign up, ask a question and then vanish).