Hey dude the Aus govt. has a register of open trials in Aus/NZ.

It's searchable (tho not well) and you can apparently set up email alerts for new trials. Hope it helps!

https://www.australianclinicaltrials.gov.au/anzctr_feed/form

get in touch with the aus psychedelic society. they can't assist you directly, but someone in the community will point you in the right direction

https://www.psychedelicsociety.org.au/contactus