OK, here's the catch. Hurst don't ship international. You'll need to find a company that stocks them. There are a few distributors in the US. I couldn't find any in AU at the time so I got a an astro imaging friend in the US to ship a few over. They ordered direct from Hurst.
Super easy to wire up guys. You can strip the same DB connector off, but I simply bought another one. You can also heat up the brass collar to get it off the shaft and reuse that. The wiring colours are also also identical to the original robofocus stepper so you can't go wrong. Attached is a shotty phone camera picture to prove its the same profile. I used the same bracket and even the same mount screws to fasten it to the bracket.
PS, Paul apologies for hijacking the focus automation thread. I guess this is still focusing related...

Happy to change the topic back on to automation again.