Can be difficult to obtain at present, but there are several Autralian companies changing production plants to provide a quality product – please avoid cheap expensive look a likes – there is one ” recipe” with use Alo Vera Gel but that is in short supply too ( say 50 g to 280ml Methylated spirits – or 80% alcohol but hard to obtain) – here is another possibility until stocks arrive in town – there is also the webpage for more discussion on the topic
https://theaimn.com/preventing-the-spread-of-covid-19/