As far as stores S.O.R. that do Pop Culture & Statues, I'd recommend checking out Cosmic Comics in Rockingham.
Otherwise, in Perth CBD, there's Quality Comics, Comic Zone, and Perth Comics Center; the latter are a bit pricey, but have some older stock.
Otherwise, there's also a couple of stores N.O.R., plus a few online suppliers, like Paul from FiguresDirect.com.au who is based S.O.R. and imports a lot in.
Good luck!