@david_chisnall @hacks4pancakes I'm not Australian, but I used to work with some who would bring a ton of them in their luggage to give out during off-site work trips. As far as I can tell, the Tim Tams we can now get in the US are the exact same, imported from AU.
Interestingly, for a few years before that they were available from Cost Plus World Market, but were called Arnott's Original. Probably a trademark issue they had to resolve first.