T-Adapter suitable for 2" focuser
https://www.bintel.com.au/product/bi...dapter-2-inch/
T-Ring (choose one suitable for your camera body mount)
https://www.bintel.com.au/product/t-rings-dslrs/
Some also here
http://www.andrewscom.com.au/optical-telescopes
There are many other vendors that you may prefer to deal with. Just search 'T-adapters in Australia'
Note your Skywatcher may already come with a proprietary adaptor that simply replaces the upper end of your focuser draw tube. (Don't quote me on that though I just know that Skywatcher is a little different to others on the market). This proprietary adapter will be shorter and have a thread on one end. This thread is the T-thread and if you have this you don't need the T-adapter, only the T-ring.
To reach focus the camera needs to be racked in more than for visual. It's important that the focuser can be adapted to provide this or is of a low profile design in which case extension tubes are used for visual.