You can purchase beginner-friendly discs directly through Queensland Disc Golf. The discs are Piwakawakas and Temokos (made by RPM discs based in New Zealand), cost $15 each and are PDGA approved golf discs. Please call Aaron (0434 194 008) to buy a disc.
Australian online retailers
Discology – https://discology.com.au/store/
Portal Discs – https://portaldiscsports.com/
The Frisbee Shop – https://frisbeeshop.com.au/