OK. So after researching endlessly and talking to many carseat sales people. There are NO Australian standards carseats with a listed weight of more then 26kg. Having said that: ALL toddler/booster seats with the 26kg rating on them have to pass the testing with an actual weight of 32kgs or more. Some of the same seats (s'n's) hold here in Australia with the 26kg max weight on them are also sold overseas in Brittan and the US with the max weight stamped at 32kgs there (the seat itself is identical, the difference in maximum weights is due to Australian standards regulations or something). S'n'S are looking at updating and changing their labeling system to fit in better with the new laws (a bit of confusion about how at this point, but likely doing away with weights and working off heights and ages instead) - the carseats aren't changing though, just the labels.

In the meantime, those children who slip throught the cracks with this new legislation (who are still required to be in a seat, but are heavier then the maximum weight - but lighter then 32kgs) should continue to use one of the booster seats rated for up to 26kgs, using height as the dertimination as to choosing which particular seat.

Hope that helps save someone else the headache I had trying to find the information.