I guess as Laggy said the easiest way would be to pick it up yourself and bring it back but i had a mate who used to smuggle replicas and real guns across into NSW from WA and QLD. He used to get mates of his to get the gun, put it in a package inside and inconspicous object, such as a toy gun box, inside a book, ETC ETC. This may be the best way to go if you cant get there yourself.