It is my understanding either of these power packs would work fine?

http://www.dicksmith.com.au/adaptors-power/regulated-ac-adaptor-12vdc-1-5a-output-dsau-m9915
$29.95 - pickup in store. Guessing delivery ~<$10

http://www.jaycar.com.au/productView.asp?ID=MP3486
$21.95 - pickup in store. Guessing delivery ~<$10

I have not tested though but most likely will be buying some - I am also posting this here for my own reference later in the week
when I am time poor and needing to get more Gridseed's up and runnning!