First, sorry for my English - I understand German so please feel free to answer in German!

I would like to service/repair a set of Beovox CX50 (replace foam) and a set of Beovox P30 speakers and check/service my Beomaster 2000 and Beomaster 4000 receivers.

I would also like to buy speaker cables for the above speakers/receivers and a cable to connect my iPod to the receivers.

Does anyone know of independent specialists in Germany (preferably in the Köln/Bonn area) that  could help with the service/repairs and provide the cables?

Many thanks for any suggestions !!!

Soto