So here are a couple of "Villiers" motorcycles photographed outside Chas Hay's Torpedo Cycle Works in Invermay Road, Launceston, Tasmania, c1924.
The bike in the middle was registered 15253 on 1 February 1924 as a "Villiers". It likely arrived from the UK complete, assembled, and branded Villiers. Only later did Hay start assembling the Villiers from a kit, and later still branding them "Torpedo".
I've done a survey of other Australian makers who used Villiers engines around this time, but Hay in Tasmania seems to be the only one using the "Villiers frame set". Even elsewhere in Tasmania, makers like Frank Beauchamp were using more conventional frame sets: his "Austral Villiers" seems to have been built with the Sun set (although pics are poor and there were a number of similar sets available). Not the Villiers set, anyway.
Finally a note of caution. A number of the makers I've listed above sold motorcycles built from the Villiers frame set in Australia in 1922-1925. So when you see a Villiers-set bike with "Torpedo" or "Warrior" or ... on the tank a fair question to the owner would be "How do you know what it was called when new?" Frame numbers might provide some guidance, but I doubt there are enough survivors to make sense of. As usual, unimpeachable provenance is the key.
Cheers
Leon