Sure is pretty.
You might want to contact SASA over there, their cowboy action shooting organization (and they send a pretty healthy contingent over here for End of Trail the SASS world championship). For the sport you have to have 2 revolvers the same caliber, a 10 round lever action rifle, and period correct shotgun. That seems pretty much an “arsenal” by their government’s standard.
I know some SASS members who have shot there, and getting the guns in was pretty paperwork intensive.
Huh? Did the Aussie gun ban ban rifles with manual bolts that turn and move back? They were that specific to where a straight-pull bolt (like most ARs) is not under the ban?