You can try your luck in Canada, our immigration system is not nearly as restrictive as the Aussies', but from what i've heard you need about the same amount of hours to land it with the majors up here (aka Air Canada, West Jet, Jazz, Skyservice) that being in the 3000-6000 hour range for the most part, as you do down your way. I guess it comes down to what the state of the industry is in our countries by the time your ready to land that big job, right now it could be better up here but in 5 years who knows, things may pick up down there.

Good luck!