Hi DrDk, you visit
http://www.pocketbookreader.com/ hit the "shop online" tab on the right hand side (I didn't choose anything from the drop down menu, just hit shop online), pick the device you want, add it to your cart, follow the directions and it will ask you for your country and then you can add all your details.
From memory, Australia was the second choice in a drop down menu once you get to the billing section.
Good luck!