The only downside to this is it's in English pounds. With our current Aussie dollar, the cost of the clothing and/or accessories as well as shipping would be hefty.
I'm really digging this jacket for winter:
Military Fit and Flare Mac-$AU118
The Aussie equivalent to asos.com is Goshcelebrityfashion.com.au. Their range isn't as huge as ASOS, but it's worth having a look. With a flat rate delivery of $8.50-it won't break your budget.