This should be it.
http://www.supercheapauto.com.au/Product/Blackridge-Air-Spray-Gun-Touch-Up-100mL/340075
I have no idea if this is a store over there or just a mail order place or what.
Also a star .8 Ive heard good things about for something cheap but a but higher on the quality scale.
Single stage lacquers arent exactly picky about what gun you use either
Yes, SuperCheap is a physical chain store over here, so they have stores all across australia so i think we've covered the two major suppliers of generic guns here in Aus.