Amazon - Panbio COVID-19 Antigen Self-Test, 4-test kit $55.95

RATs in stock. High sensitivity according to TGA.

Over-the-counter rapid self-test for COVID-19
Detects active COVID-19 infection with and without symptoms
Trusted brand in over 100 countries
Can be used in all ages. Children under 14 years old should be supported by an adult.
Simple test procedure using a nasal swab
Fast results in 15 minutes; no need to wait for a healthcare provider
Illustrated step-by-step instructions