I have this knife, and liked it well enough to buy another. It is a pretty good camp knife, but a great hunting knife. The original Schrade wasn't anything all that special as far as materials go. Stagalon or some other nonsense for plastic/nylon/synthetic, and some kind of carbon steel. Someway, it all came together great and I took that knife on many a trip for years and years and used the daylights out of it. My only gripe... with "old Arthur" getting to be a bit of a pain (literally) the handle is a bit skinny for me to grip comfortably now. Still a great knife, though.
I really liked the fact that it had a tiny leather pouch sewn on the front that you could carry a 1"X3" stone in. Many is the night I sat in front of the camp fire and polished the edge with an Arkansas stone to get it ready for the next day. With its edge geometry, that knife will get wickedly sharp.
I think if I were you, considering its slightly irregular blade shape I would take it to the next couple of guns shows and see if anyone could help you out with a sheath. Buying online might not get you a sheath (unless it was made for the knife) that will accommodate that sweeping curve. Even a cheap nylon sheath would be good until you could get you hands on the one you want. I like the idea of buying a new one and using the knife that comes with it for something else, too. That way you could get the sheath and have a knife for the tool box, to leave out at the lease, or to keep in the shop as a utility knife.
Robert