Contact Dwayne @ Armorallleather. He makes all kinds of configurations & styles. He can make them for you out of Shark Skin, Snake Skin, Ray Skin, Emu, Alligator & all kinds of others. He makes a fine sheath. Check them out!
http://www.armoralleather.com/
http://www.armoralleather.com/inlay_skins.htm