Ok this is going to sound real silly

I live in Australia. I would like to purchase LimeWire Pro. I don't use and have never had credit cards. The option to buy using a money order says it needs to be issued in American dollars from any North American bank.

Does that mean I can't just go into the Post Office tomorrow and get a money order made out to LimeWire Pro? Or can the Australian post offices do this?

It would be good if I could pay via PayPal, but I guess that's outta the question too.

Cheers in advance
Lisa