Browsing for Transformer related showbags at the Sydney Royal Easter Show site and found the following:

Action Force Transformers Showbag ($18)

Mega Transformers Showbag ($12.50)

Even those these showbags appear to be unlicensed IMO they offer better value for money than the official Transformers Energon showbag that they had a couple of years ago - for the simple reason that these showbags actually come with TOYS! I still have my TF Energon showbag w/ original contents and I still can't believe that Hasbro were silly enough to release a Transformers showbag with no toys in it!! Even if it was just a Mini-Con or something... gah!