Probably better answered in the Importation room as you are limiting your knowledge pool to Vic.
Main question for me, why would he want that specific one when there are 11ty billion here for sale?
I think dotars would be your best bet as for it to come in, irrispective of its previous existance here, it would have to fall under an importation rule or have left on a specific permit to enable it to return (I would have thought). That said there could be a special clause for cars that compete outside of Oz but call Oz home. I saw a Vic plated car at the Gumball in 2005 in London so if it was genuine, it must get back in somehow.
Any more details on the car/location/reason?