I so much wish I'd be from down under as well.
install bags on a car over here, is red card at MOT directly. Don't have to do MOT yet, as she is younger than 4y old, but once she turns 4, if she's bagged, that's a MOT failure, and I may not even be allowed to drive it back home. Because this is not how the manufacturer had planned the car, so it is surely definitely dangerous, you see :/
So I'm keeping her chassis & powertrain stock...