You probably saw these:
http://www.otca.com.au/boards/showth...imus-Prime-set
http://www.otca.com.au/boards/showth...imus-2-toy-set
The reissue G1 Optimus Prime (without trailer) in Hasbro English packaging was first released as a Walmart exclusive in USA and a general release in Asia (outside Japan) in late 2018/early 2019, and now as a Kmart exclusive in Australia.
The same reissue G1 Optimus Prime but in TakaraTomy Japanese packaging was then released as a set of 2 (together with repaint of studio series Optimus Prime from the Bumblebee movie) as an online exclusive in Japan and general release in Asia in late 2019, and EB Games/Zing exclusive in Australia in early 2020.