Sadly, *most* camera lines that were popular in medium format aren't in production anymore. The good news is that the Contax is one of the better-supported cameras out there. If your body dies, it's pretty easy (and cheap) to replace it. There is a generous selection of lenses, and those can also be readily found.
I'd recommend going with another back (used) with your Contax. It's a great system, and still has a large following, and many unique lenses (AF 35mm Distagon, AF 80mm f/2, Zeiss' most advanced 120mm macro, AF 350 f/4 Tele-Apotessar...) not found anywhere else.
To actually answer your question, though, the simple answer is 'no'. Flange distance (distance the lens is designed to be held from the sensor) is too short for any 6x6 camera (Hasselblad V).
There is no way to electronically couple for the Contax lenses to stop down during exposure, and no way to even stop them down manually, as the lenses have a fully electronic interface. This takes care of the others (Hasselblad H, Mamiya, Sony, Nikon, etc.). Also remember that the Hasselblad 500-series V and H are leaf shutter systems, so a Contax lens (with no built-in shutter) wouldn't work there, even if it could be coupled.
So, without a lot of clever engineering, possibly custom optics, electronics, precision manufacturing and a lot of money and patience, the Contax optics are really only for use on the Contax camera. Not that this is a bad thing--as I say, it really is a great system with plenty of life left in it.
HTH,