Growing this season some Chiltepin seeds from a guy in a village from Mexico, from Matamoros, Tamaulipas. He told me they call this one Mountain Pepper (Chile del monte), completely wild. No idea what exactly is the Tarahumara (probably is from the area where Tarahumara people living), probably not the same as the one I am growing.
Later edit: oops! I see now you found a source in Australia, and the one I found is also Australia, so probably the same... Sorry...
Let me see if I can find something on a Spanish chile site
I have to place an order at https://solanaseeds.netfirms.com/hotpeppers.html
they have Pepper Tepin (Chiltepin)(Capsicum annuum, v. aviculare) One of the smallest pepper, at barely 1 cm. Still grows in the wild in northern Mexico. Natives collect the fruits. They are used to make a very hot salsa. Can be dried and ground. Bushy plants. Also called "Gringo Killer" and "Bird Pepper ". Use warmth to facilitate germination (25 to 35 C). Packet of 15 seeds: $2,99 can
if you want I can order and ship them to you, and will do a trade