Yes they are still available just not a popular size here in Oz.
Purchased mine at the beginning of 2018, pic is from high country trip in March. I think I paid $320 a pop.
Still going strong with about 20,000km on them. Good for another high country trip in March and a Simpson crossing in July (if the $$$ stack up).
I want a mud tyre for my Cape trim in 2020 and if KM3's are not available I may go Yokohama GEOLANDAR G003 but at $450 each!!!