How about somewhere not to far from Bonn......
Have you heard of Claer? he builds THE most awesome buses that have ever turned a wheel.
Although he doesn't have a web site there is plenty on the web regarding his buses,heres a link to one of them with his details on and as can be seen from the attached map it's not that far from Bonn.
http://translate.google.com/translat...l%3Den%26lr%3D
If you do make it there Please take some photos for us all to see.