Hi Grayham
Your best bet is to contact any of the following...
Dave Battin
Phil Bergeron
Sam Goldwasser
All the above are in the States though. Failing that keep an eye out on eBay, C315m's do pop up from time to time.
Cheers
Jem
Quote: "There is a theory which states that if ever, for any reason, anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.”... Douglas Adams 1952 - 2001