I'm needed!
Frisbee shop (WA) or Discology (Tassie) are your best Australian options for an online purchase.
http://discology.com.au/store/#!/Dis...0&sort=nameAsc
Though if you want something sooner, I could hook you up with either of the guys that have stock for the Newcastle club. JJ lives in Mayfield, Neil lives out at Blackalls Park but would most likely be able to drop discs in or meet you at the park.
Neil would also have some beginner discs that are club stock so you could probably go for a throw with him and try before you buy... plus get some advice from one of Australia's top 5 players.