Wow! Good luck with sales Len!
Takeda AS stainless clad fits your criteria.
Heiji semi - stainless perhaps is an option. But its on a thicker side, can have wedging issues on
I have two of these, as well, one of the original numbered run & a second for my work rotation. Get's hair splitting sharp and is super comfortable
Well, since your from Germany, why not go with the Herder Windmühlen Nakiri? Price is ~50€, it's available in carbon and you can easily get it sharp enough