So, K-cut don't have Hardox in 20mm thickness in stock and can't supply it (at least not for now).
And every other company is laughing about someone just wanting a disc of 25cm diameter and not a whole excavator shovel. And ebay only seem to have thinner material (mostly shooting targets) or rectangular pieces with at least one side under 25cm.

yeah, kinda desperately looking for a piece of Hardox in 20mm thickness and big enough to get a 25cm diameter disc out of it now.

(also looking for two sheets of 4*340*280mm titanium, but at least for that there will always be some chinese guy on ebay...)