bronzedpeptides . com - formally Hush Hushhh. I wouldn't buy from anywhere else within Australia. I've used Melanotan on and off since 2011 and I can say that their vials produce amazing results and are consistently the same high quality. They guarantee delivery in Australia which is great as I have lost peptides in the past to customs seizures so it's nice not having to worry about potentially losing my money each time I purchase.
They have a blog that discusses all the recommended dosages