I haven't tried this fragrance before, but I've heard it's really nice.
I've done a bit of searching for you, and this is what I've come up with:
Fragrance Direct in the UK has a 100ml tester for 29.99pounds (which is about AU$75)
Perfume Emporium in the US sells it as well, but it's more expensive
Also, there's a reputable Ebay seller who's got a refill spray bottle up for US$44.95 ($AU57.55) - finishes in a day