White gas is some times called shelite over here in Aus maybe it is sold under that name?

members.iinet.net.au/~mbuckl...ex.shtml

Having just had a heck of a time finding fuel for Spain, I found this website very useful.

These are the names they recommend: Kocherbenzin
Feuerzeug Benzin
Katalyt Benzin
Reinigungsbenzin
Reinbenzin
Fleckenbenzin
Wundbenzin

This being said, Coleman Fuel is a select composition of 'white gas' that is specific to Coleman, and these others burn different (though are better than lamp oil!). I strongly recommend purchasing a small container and spinning with it just to make sure it isn't going to be too hard to handle before committing to a large container.

Sadly, due to time constraints and issues with translation, I had to settle for lamp oil in Spain. The largest problem you may run into is that White Gas is a different substance in England than here, so if you are asking for white gas in Germany, it may not be the same thing to them. (And, having spent a large time in Essen this past summer, I can say that at least in NRD, white gas is not easy to come by because they associate it strictly with pure jet fuel, and not camp fuel.

Good luck!