Here is some suggestions I got from another Aussie:
ORIGINAL: MTBikerTim
www.Wattsuprc.com.au has the bantam chargers and a range of cheap batteries. Otherwise
http://aircraft-world.com/ is pretty good value for us. I take it he wants some where local though.
www.feralbatteries.com.au has race style packs, their sales service is great but after that their service is non existent.
There are a few other places like harrisrc.com but I haven't purchased anything from them.
Will post more as I get them.