Also called grasscrete, cellular paving, Austral Grass paver (but I don't know if it's available from Austral Bricks)
I'm struggling to find who sells any of them in Perth. I did have them in one of my designs as the City of Vincent did like them but they are now considered a dangerous trip hazard so I don't have them in the design anymore.
If you want to do something similar you can do it by spacing normal paving bricks with a gap or maybe go to salvage yards and see if you can find some of the 50s concrete breeze blocks and lay them on their side if the area is only light traffic with a wheelbarrow