Given that you're from Cobar, you would be paying postage costs if you bought from australia. Much climbing out there? Have you tried negotiating a bulk purchase with somebody like Rock Hardware?
MEC can not send alot of gear overseas, like BD cams and ice tools as it goes against some trade agreement they have with US suppliers. Ironically, other gear shops in Canada can send you what MEC can't, and usually give better deals.
Also, Australian Customs will go through your gear, and if they find a receipt that totals more than AU$500, they may charge you extra taxes / duties.
I have a friend in Canada who sends me over gear every now and again. Mainly items like ice tools and clothing. He will shop around for a good price, take off all the wrapping and labels and send it over without the receipt. He also puts something like "Wedding Present" on the customs declaration form (I have been "getting married" for a few years now). Air freight takes around 10 days, sea freight takes around 6 weeks.
And if you're after European items, check out www.k2sports.com - they charge 25 euro's for air freight