CMQ is tops in terms of beauty, personality and service. IIRC, she is 1000cc. I generally find it hard to find girls larger than 1500cc in Australia...I think since hooking is legal there, girls don't need to go larger to make a living.
In the >1000cc crowd check out Tori Cummings & Portia Paris. Summer Brielle hooks under the name Sierra Belle, though she's "only" 800ccs but they are silicone and feel devine. A great website for Australian escorts is scarletblue.com.au and all are listed there.
Also KissApril tours Australia as she live in Japan: 1500ccs, beautiful and kinky with the best kegel muscles ever. My favorite to see in the US as she comes 2x/year.
Happy hunting!