I was hoping that Black Zarak would be sold through Amazon as well (Hasbro Australia said that from this year we would see EB Games exclusives be sold through Amazon as well, but they didn't specifically say it would be for all EB Games items)... and someone has found an odd listing on Amazon Australia that is using the Black Zarak images, but is listed as a Power Rangers place-holder listing, for just au$45. (it is not showing as in-stock, but can be carted for purchase)
This would not be the listing for Black Zarak, but suggests that Amazon Australia has the images on-hand, ready for the listing to go up... which I hope is soon, as I missed out on the EB Games listing.

I have added this item to my watch list, just to see what happens with it.