Tony, are you after a ToUcam 900?
Try
http://www.telescopes-astronomy.com.au/ Matthew may still have them. I think you can order them from somewhere in Hong Kong but I don't know the details.
Other webcams you could consider are the Celestron Neximager, thought its basically a rebadged ToUcam. You could try a Meade LPI but I wouldn't wish that on anyone starting out. Then the prices really start to jump up to the DMK, DBK and DFK range of cameras (See:
http://www.myastroshop.com.au/products/cameras.asp
https://www.bintelshop.com.au/welcome.htm search for DMK, DBK, DFK)
Apart from that you could consider a GStar but it will depend on what you want to do with the camera. What type of imaging are you thinking of doing?