For me up until the last couple of years it was TV, let's face it, TV's as entertaining as watching paint dry with the exception of maybe 1 show which made me laugh which was the Chasers war on everything, Australia just has no concept of comedy.
TV (Fixed for now) i've got my fix.
Crisps (Skips, Quavers, Discos etc)
Cherry Coke (Although about 3 years ago, they had Cherry Coke for about 4 months)
Cherry Aid. (similar, Australians don't seem to like Cherry Drinks)
Dandelion and Burdock, although Sarsaparilla tastes similar.
Dry Roasted Peanuts (And they used to sell them too!)
Gammon, like they serve at restraunts in the UK, you just don't get it here.
Ever tried to order Chicken Fried Rice from a takeaway here?... they have no idea what that is! home cooked for that.
If you miss ale's go to Parafield airport next to bunnings there's a liquor shop there which sells almost every imported lager/beer you ever drank.