Hello Jonathan-L,
I have contacted with local dealer of B&K (www.bksv.com redirect me to cantact with a local dealer) and delaer answer me that although the device is quite old, they will try to help me. However, i waiting for the answer more than two week and I do not know how long more to wait for their response... Thus, i tried to find to the requred system floppy by myself.
Best regards,
Dmitriy.