Gemeinschaft der Jagdflieger e.V:
http://www.fliegergemeinschaft.de/
And perhaps here:
Traditiongemeinschaft JG 3
Herr Rudolf Müller
Buschweg 11
03149 Forst
Germany
Tel: 03562-7294
Email:rudymig1@freenet.de
Finally, the GdJ will be holding its Internationales Fliegertreffen in Köln from 6-8 October 2006.
Best of luck!
David