A dude in France (actually two now) have built their own - the GT220 is exactly as described by others and I can assure you there's no magic GT265 Perfohub and LSD wagon in AU.
You can have one, I can send you exact parts lists, etc but expect about $10-15000 to change hands to have it done. That's LSD Perfohub and tuning. If you can't change to Recaros as the side airbag systems are not approved - well you can change the seats and plug them in, and they'll work but it's not in any way legal as the bags aren't complied in the wagon shell (semantic argument I know).
Also you have to run Steevs or similar offset wheels at front to get back under the guards.
You have to get the electric rear calipers to work on the different rear rotor/hubs which the other converts in France hadn't needed - some euro GT220s are conventional handbrake our use the powered park brake.
You can adapt the rear brakes from a Scenic on but I'm unsure you're going to get the track increase needed, so then you need to run spacers (illegal) or have the RS265 offset compatible front wheels with the regular GT220 offset rears.
It would be "easier" to have rear hubs custom made to get around this, at least they can be engineered.
All in all not as easy as it sounds unless you have $$$
I'll have full diagrams and parts lists on my blog shortly, currently interpreted around 500 components in the GT220 stock front and starting the same for the RS265.
Then we cross reference what's common (mostly fasteners) and finally determine if we can (safely and legally) adapt stuff like the lower arms to allow the stabiliser rod to bolt on, rather than use a RS265 arm which has a threaded mount.
To be honest the swaps I've seen were subframe swaps and super easy, but in France a front and rear RS265 subframe set with brakes and suspension and under 5000km is about EU2000... and "common".
We have to think harder (right down to what other Cup chassis bits can be used from Meg2 or Clio3 if any at all.
And after all that what we really need is an LSD
That's going to be < $5k well spent.
I need a money tree...