Hello
sorry for late repl but read just now this treat.
There are no shops left in Luebeck and Travemuende >:-o .
In the near of Hamburg, place called Barsbüttel, you can find the shop of Stauffenbiehl.Staufenbiel Hamburg | Ihr Modellbauspezialist im Norden (https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0ahUKEwi96Mu0gIPcAhXjbZoKHT5vDzwQFghFMAQ&url=http%3A%2F%2Fwww.staufenbiel-hamburg.de%2F&usg=AOvVaw3jMo4THjFl3zUZS9BDu0gZ)
In Bremen Blumenthal there is one Modellbau Hasselbusch (https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwi467CQgIPcAhWHd5oKHXuFCMAQFggoMAA&url=https%3A%2F%2Fmodellbau-hasselbusch.de%2F&usg=AOvVaw2m9tjshn36n5OlneM5mxuD)
I forgot: in Kiel, part of called Raisdorf, you will find company CONRAD which will keep cars, planes ships and rc equipment.
Maybe you use this Infos next time.
b.r. Sven