You're welcome, Joe;
I'm always glad to help someone if I can.
I'll talk to Ed and get that information - he's working on a biography of Ernst Kupfer, and helped me with some contacts for my Oesau bio, and in turn, I'll help anyone else who needs it to the best of my ability.
Best regards,
Cori
Here's the link for the Bundesarchiv:
http://www.bundesarchiv.de/ - hopefully I'll have some more information by the end of the month.