Just noticed the Mac version of the WD 2TB portable external drive is quite cheap (confirmed by camel). It seems this drive is no different to the normal black version except pre-formatted as Mac, but still posting if someone is interested.
NOTE: You sometimes need to go to "More Buying Choices" click 'Add to Cart' for the Amazon.com seller (as they post to AU).
Seems the US to AU postage is higher than usual at $17 or maybe it is just for this particular drive.
ref link: http://amzn.to/YjBsRG
Just the price I was waiting for.