thanks all. One of my new knives is a boot knife with a purpleheart handle. I can't find a belt sheath for it, and didn;t want to start learning leathercraft. I was thinking of cutting 3 slices of purpleheart (to match the handle), cutting the outline of the blade on the center slice, then gluing it all back together. The video above shows use of some fleece to line the internals. I'm not sure that the blade point wouldn't snag on the fleece, but it looked like a good idea. I was hoping for a way to connect the sheath to a belt and to secure the knife from sliding out (connect the knife to the sheath). Still looking at those.
A second knife is a filet knife with 7" long blade (12" overall) with east indian rosewood handles. Also no sheath yet.
I may try to prototype them with 1/8" and 1/4" BB Ply rather than waste the purpleheart or rosewood. If I get something that looks good, I'll post it.