Victoria is the only State that that seems to be rather anal about laser pointers.
I suspect the lawmakers have watched a few too many star wars movies.
I'd be far more worried about a big Pacific Islander wielding a 8 cell aluminium Maglite than some astronomer with a pencil sized "laser" ( said with an Austin Powers emphasis)
They can be purchased quite legally in all other states.
I'd even venture as far as to say free trade between the states would allow mail order purchases from north of the border.
As to whether you have a Vic permit or not is not for a vendor to decide