while im not currently in australia, (moved to germany cause of my love) i was for a few months last year there. born n raised in south east QLD i do know how bad the humidity can be. I only used conditioner.... n while its been a year now, i have forgotten what its called..... though it was all natural with alot of natural australian organic herbs and oils. annoying me that i cant think of the name, omg, im even googling it to try to find it for you
this is good i tried this: Avalon Organics | CONDITIONERS (not the one im thinking about though)
yay found it just before i was going to post this, talk about luck!
here ya go, its great, i used it manly for a leave in, (conditioner only styling here) though also as a "normal" conditioner. i got it at priceline.
Alchemy Jojoba Conditioner Chirinka Shop
its a great find

my hair: 3b, high porosity, high density and coarse hair (i think i finally figured that all out)
my hair loves conditioner only styling!
Oils and my own procuts are my hairs best friend
my hair goal length is bra strap length when curly.