I made a ratyhr cool training device - a marati - for Indian martial arts by taking two Chen hewing spear heads and fixing them to either end of a wooden haft, making a doulbe headed spear. I then sharpened the blades.
I took it along to the Gunpowder Mills event, and left it there with the swords for some test-cutting, if someone wanted to have a go.
They did, and one of the heads bent at the neck almost at right angles, by striking a plastic bottle of water.
It didn't cut the bottle, either.
So I would recommend Chen spearheads for waving
at targets, but not actually throwing at them.
If uoi want something functional, why not get something from one of the Czech makers?
Hell was boring so I came back.