As far as I know, LSA is not a big success in Germany - no more than in the rest of Europe. You could perhaps try asking at ulforum.de, most messages are in German there but you will get some kind of reply.
As far as I know, syndicates are mostly a UK phenomenon, on the Continent I see only few. And as LSA's are rather rare here, few clubs operate one. Here in BE some clubs own typical LSA craft, but have them registered as "aircraft" i.e. to be flown with a PPL.
On the other hand, 3-axis ultralights are getting more and more sophisticated, especially in Germany. Depending on the kind of flying you intend to do, an ultralight might be your choice: there are lots of clubs, around Köln, and even co-ownership might be found.
Good luck!