I assume you mean a kydex sheath for a khukuri? (because there are hundreds of folks who make kydex sheaths in general)
If that's what you mean, I have one in progress right now. It's not terribly difficult to accomplish yourself. Just need an oven, some plywood boards with foam glued to it and a willingness to try and try again...
Has Terry Sisco made any kydex khuk sheaths?
Dan