Hi janey222,
Welcome to the Mattress Forum! 
The last time I was asked this I think was in 2013. I discuss it a bit more in post #2 here. Because the methods for testing are different in Australia (we test 25% compression for ILD in North America), their numbers, even when converted, would be higher and not directly relatable. My best recommendation (as in the post I linked to) is to use your own personal experience when evaluating a mattress and then use that as a reference for your “comfort spec”.
European Bedding has some good information about pascals here for latex. In general, they say a soft latex mattress is around 3.5 kPa (kilo-Pascal), a medium around 4 and a firm around 4.5. They also have a chart on that page relating ILD to kPa which you may find interesting.
Phoenix