Here is a photo of the sheaths we had Eric from On scene tactical make for the canadian (except for Gravelface) group buy.

These are way better than either leather or especially nylon and he even has a couple leftovers. You can PM me, google OST or link to his site from the Busse recommended sheath makers page on the Busse site if you are interested.

There are other excellent sheath makers here as well like Rainwalker who is going to be making me a Keeper sheath and Leatherface who made mySS4 rig.
I also believe the small Spec Ops sheath fits but you should double check.