A batch arrived at Logical Choice here in Canberra a week or so ago, but they sold out instantly. The guy at the counter said the next batch should be here this week. I've got my name down for one.
You might try the Military Simulations guys. (www.milsims.com I think). They got all my business when I was living in regional areas. They were good, but it doesn't beat checking your local store every week or two.
I second the comment about Military Simulations. When I was living in Karratha it was the only way to get the books. And Karratha is about as far away as you can get in Australia.