No there is no pre-order for Australian fans because Australia and other parts of the world will be getting the game long after everyone has played it.
What you CAN do however is pre-order the game from overseas through Amazon or the US Gamestop site. When the game is released it'll arrive and you'll still be able to play it. BioWare has said that there won't be any IP blocking for people outside of the areas the game is being released (and hopefully it'll stay that way).
Of course since you're asking this, the unfortunate fact is that you won't be able to get the Collector's Edition version now because they're all sold out.
So you can either do two things, pre-order the game now and enjoy it 1 or 2 weeks after it's launched around NA/EU or wait a few months after the game is released overseas... or maybe wait a whole year for it to be released in Australia... just so you can get a Collector's Edition version of it... which probably won't be as good as the ones that initially came out cause we're Australian and they like to not give us the good stuff... that and I'm the game will be sold at a much higher price for us.
You're Australian, I'm sure you know this already though lol.