There's a Global Pet Store in Sydney. Don't know how close that is to you, but Global carries all the top foods and I think most of them have a loyalty program so buy so many bags get one free.
Orijen is good, Acana is good. I have mine on Acana, I switch around. I had a throwing up problem with one of mine. Got his blood work done today and he's perfectly healthy for a 13 year old. I can't feed him grocery store brands, he brings them back up in a couple of hours. I also feed quite a bit of canned and that took awhile to find one that he can keep down.