How about if you took a large knife handle and made a mold of it, took one of the smaller mora knife blanks set it inside cork, even wine corks, then set that inside the mold, followed by some spray foam insulation. If it does not float, make the mold larger and spray in more foam.

Got the two Frosts Moras today. Not bad at all for $10 knives! They appear sturdy, strong, and ultimately quite functional. The appearance is basic, but nice enough. Functionality over cosmetics was what I was looking for, and exactly what these Moras provide. They are bigger and beefier than I expected.

The sheaths are not works of art. The one that came with the Clipper #840 is decent enough, very serviceable. But I don't care for the one that came with the Craftsman #860, you can't just "drop" the knife right in. You have to work a bit to get it lined up just right otherwise it drags and hangs and shaves off bits of the plastic sheath. I think they tried to make it too small.