Baz - these guys are consistently the cheapest I've found in Aus, esp since they opened a store here in Brisbane. Even where you are, it's probably only $25 or so delivered.
http://d-d-photographics.com.au/canonlenses.htm#14
Thoroughly recommend them. I just bought several grand worth of gear from them. No worries. Don't let my wife read this. Don't let my wife read this. Don't...