There are three in Brisbane, at least one in Sydney and three in Melbourne also, I think. I have a MK2 empeg, Shonky has a Mk2a riocar and I'm pretty sure the other guy here has a Mk2a too. I only know of one Mk1 in Sydney but haven't heard anything from him for some time, well over a year.
PaulWay has my Mk1 in Melbourne and I think rjlov has a Mk2a

Don't know anything about WA. Somehow I don't think we'll be having a meet here soon tho