Jon Saxton's Website is a great resource for Australian predecimal coins with a particular emphasis on bronze coinage die types.
Stuart Andersen Pty Ltd
lists a good range of Australian coins including PCGS slabbed coins and a selection of varieties and errors.
lists high quality PCGS slabbed Australian coins.
Over the years, PVC has been the major cause of damage to coin collections in Australia. The Purple Penny stocks coin storage materials guaranteed to be free of PVC.
The Australian Coin Collecting Blog contains useful information mainly on error and decimal coins and up to date coin news.