PSC yachts are fairly rare in Oz. Had a quick look and the only one I could find was a PSC 37 on Yachthub which was way out of your price range (A$184k). Most internationally recognised yacht designs are going to be a lot more than your budget. Suggest you look at some Oz designs. Adams 31, S&S34, etc.
Suggest you also look at
Boatsonline
Ilenart