Could be early days yet but this is the response I got earlier today from Hasbro when I emailed them my query last week:

Hi Michael, I am sorry for the delay in responding. I have checked with a colleague who specializes in Transformers. He has confirmed that the Masterpiece Soundwave line will be sold in Australia through Toys-R-Us, but not until July 2013. They are expected to sell in Toys-R-Us from July to September. Kind regards, Hasbro Consumer Services
T: 1-300-138-697 - custservau@hasbro.com
HASBRO AUSTRALIA LIMITED: ABN: 69 004 348 565