Just announced by Hasbro for release in October is a 5-pack of Studio Series toys to commemorate the 15th anniversary of the 2007 Movie.

The pack has the main Autobot cast from the 2007 movie - Voyager SS-32 Optimus, Voyager SS-14 Ironhide, Deluxe SS-04 Ratchet, Deluxe SS-49 Bumblebee (2008 Camaro), and Deluxe SS-09 Jazz.
They all have some slightly different decos to their original releases... mostly less decos with Optimus and Bumblebee. Ratchet and Ironhide might have slightly better decos though.
(and after 5 years of Studio Series, Hasbro people still can't transform their toys, with several mis-transformations on the official images and on the packaging)

The box comes with a reversible diorama insert, so that you can display the toys as if they were in the back-alley meeting Sam for the first time, or in Sam's back yard while he was looking for the glasses.

The boxset is currently on Amazon America for us$142, and looks to allow for shipping to Australia (with about au$30 shipping)... and I'm not sure if it will be coming to Australia. If it did, it would probably be about au$250-300, based on the US price, which would not be worth it for 2 Voyagers and 3 Deluxe toys (currently retailing for about au$190).