Steve,
there is no USPS shipping to Australia at this current time. Well, no priority mail. If you want to pay the extra, as Dan explained, you can pay for express, but, it is a ridiculous price.
Shttermans issue is not isolated. New Zealand Post tells me a package has been delivered. The recipient tells me he hasn't got it, I believe him.
I paid for extra insurance. But, that will cover the purchaser for their loss but I'm still out an engine!
There are just too many packages going missing.
Craig