Honestly, make your own. That's what I did for a cheapie ontario I had, just took a piece of wax paper, a piece of cardboard, wrapped the cardboard around the wax paper to make a sleeve, and then sealed everything up with (no shens) duct tape. Then, I put a small loop around the end to make a swing sheath, and it works just perfectly. Doesn't look very good, but it does keep it dry and from cutting you.