It's not a big deal to make one yourself. Not an Opinel in this picture, but I have several of those sheaths and have carried also Opinels in similar self made pocket sheaths. Just a piece of leather, suitable cord, a needle and a punch are needed. Pliers made to make holes in leather is a big help. Some contact cement is usefull. The time needed to make this sheath is about one hour. It is a good idea to wet the leather slightly, then wrap the knife in plastic and wrap leather over the knife, put some glue on the edges, use clothespins to hold the edges together. You can mold the wet leather as it dries. Make the holes for cord. After the leather is dry you just sew. Done.
