Just got off the phone with Graham from XR Performance in Dandenong... he said he can do em for $66 for a simple regas (apparently a lot more for a flush as its a more involved process). He said he can only fit 2 in a day because it takes about 2 hours to recharge a car... but he's happy for us to come one by one every day, and 4 on next friday.
He only reopens on monday, so he asked if I could get a schedule of who's gonna be coming in when with their cars then he can sort us all out.
A lot of the shops are closed for the break, and only reopen next week, so I guess if people aren't happy with the price then I can call around then.
edit: he also mentioned he can convert the R134a guys to HR12 for $66 as well, as its a matter of bleeding the system and recharging it.