E30 Zone

Guys I'm looking for an original Bavaria Business C for my E30 M3 as it was originally specced with this unit.
Any ideas where I can look or anyone know anyone etc???
Been looking on Ebay and no luck yet!

Any help or pointers are appreciated.

Mike

They do pop up quite frequently on here and ebay. I think there's a few on American and German ebay at the moment.