Hi Al,
You want a Skywatcher Multifunction Mount.
Available in Aus from Borges Imaging in Port Melbourne and Bintel (though you don't get the tripod with the Bintel one I think).
http://www.borge.com.au/sky-watcher-...t-p-17234.html
I bought one from Borges earlier in the year, works well with the Stage Zero dolly.
Cheers
Stuart