As fate has it, I just asked the same question! In my case I am looking for
a cogged belt for the variobelt pitch adjustment for my CS-505. I was given
the following information thanks to Tim Schwartz...

South Street Service
202 South St.
Oyster Bay, Long Island, NY 11771
519-922-0358

I have an uneasy feeling that dust cover will be very, very costly. I
recently had to replace one on my Thorens '318 at the tune of $100 - but
given the fine service it has given me since I bought it new I felt it was
worth it. Recently when I bought a used Yamaha PF-800 the dust cover was
damaged in shipping and a replacement is not available.

Don't you hate UPS sometimes?

Regards,

Alan