Safe n sound and steel craft do some, if you google britax and go to the australian site you can look at them. I use the unity capsule and the profile stroller and love it the capsule for that one goes to 12kilos.

From looking at the babylove one the capsule goes to 9 kilos.

If you go to a baby shop most let you play with them. I did and I choose the unity as it went to 12 kilos.