Just yesterday I created [email protected] for this very purpose, so I'll plug it again. Well, not miniatures specifically, but rather a place for people who haven't got printers to ask for help from people who do.
I'm not in Oz so I figure shipping to you would be quite prohibitive. But you might be able to connect with someone in your country, who can ship printed stuff to you more cheaply and -- importantly -- without having to fuck around with customs.
The go-to wisdom is that detailed miniatures are best printed with a resin printer. You can do it with a traditional FDM (filament) printer but it's harder to get the small details reproduced, and FDM printers can't print in midair so you either have to be very careful to take that into account with your design or do a lot of work with removing and doing the finish work around printed supports. So you probably want to find somebody with a resin machine.