You could try ozgameshop they are actually based in the UK but specialise in selling to Aus.
I didn't notice anything on the site that said they don't sell to other countries and they have US$ as a pricing option.
I ordered 5 copies of Iron Front from them, order went in on a Friday and they were at my door in Australia on the following Thursday.
To top it off they are around 1/2 the price of buying locally.
Scott