JIC Magic makes a nice coilover setup, shouldn't be too hard to get in Australia, although a little expensive. Also, quite a few companies make standard style (non adjustable) drop springs for it such as tanabe, eibach, intrax, and a few others I can't think of right now. I would think the best bet is find a company that sells it in the U.S. and contact them to see if they can ship it to you down there.