Thanks for the replies.
I'd already checked out Steve's pages (have bought from him before) but his adapters
are the other way around, to use SLR lenses on a C-mount camera. I have C-mount
lenses and want to use them on a T-threaded camera.
Thanks all. I've had a reply from Steve Mogg, and he doesn't have one suitable.
But !! SBIG have one as an accessory, and ATS have them in stock. I've ordered one.
Thanks for the replies.