This company advertises that they can do repairs on these older German scopes. http://www.ironsightinc.com/

I recently sent them my Swedish AGA M/42 scope from my Swedish M96 sniper rifle. They told me it would be about a 10 month turn around time but failing to find anyone else that could repair it I though it acceptable. Price was $105, up front.

I did have, several years ago, a Carl Zeiss, Jenna Zielsechs scope repaired. The horizontal wire blew loose on recoil. I forget whom I used but I do remember that whomever I used was unable to repair the Swedish scope. He could not get it apart. I sent the Zeiss scope to this fellow because Zeiss, US said they don't service these scopes (I thought all Zeiss scopes had a lifetime warranty.)

Vlad