Chisel knives are availible overhere in our hardware stores and at fairly the same quotes as chisels.
I too have found it fun to experiment with chiselknives, in order to do conventional knives from a strict working tool.
This is a WIP from a Bacho #2448 chiselknife
Last pic is together with a Bacho #2449
The #2448 and #2449 are the same except for the tip.
Really ugly thingy's, but 4mm thick and 100mm bladelenght.
Hardness is kept at the lower side to maximize toughness and ease of sharpening.
My knife isn't finished yet, but it's assembled with a nut and can be used as is to test how it will work.