There's several I've seen mentioned about the forums here that I'm sure could make one. Try searching for "sheath".
Good luck and let us know how it turns out.
Knowledge without understanding is knowledge wasted.
Understanding without knowledge is a rare gift - but not an impossibility.
For the impossible is always possible through faith. - Bathroom graffiti, gas station, Grey, TN, Dec, 1988
AKTI Member #A000831