Guys, guys, there is a lot of detailed info on the thread mentioned by meloccom. the 3 phase adaptor is available from Tesla for $130. You then need to purchase a European in-line connector which plugs into that. Finally, you need to purchase an Australian 3 phase plug usually 32 amp but a second 20 amp plug may also be required. Finally, you need an electrician to wire up the in line connector to the plug. (If you have any electrical skills, it is not hard to do, just use 6mm square wire 5 core for the connection.
Regardless of the socket you use, the universal connector that comes with your car can only accept a maximum of 16 amps per phase. Which, as Ray says will give you approx 50km per hour. However, the 3 phase adaptor from Tesla can also be wired single phase so you can also make up a 15amp adaptor, which will give you approx 15 or 16 km/hour. You get 10km per hour with the 10amp adaptor the cord comes with.
So, with the one Tesla adaptor, you can make up a full range options single as well as 3 phase, but of course, each one needs its own in line connector, and wire/plug. Personally, i have a 15 amp single phase, a 3 phase 32 amp, and a 20 amp 3 phase made up this way, and they all work.
If you buy the Australian plugs from a retailer they are wickedly expensive like $150 or so EACH, BUT on eBay, they are available a hell of a lot cheaper. The in line connector you get from Uniquip in WA who have free shipping and they are relatively inexpensive at around $44 incl GST. Raynewman in the thread mentioned provides a link which takes you to the correct one for purpose, but essentially it is red, 16amp 5 pin.