Hi Danny,
I presume that the rectangular pouch on the outside of the S&W sheath is for a sharpening stone? It looks too wide to be for a folding knife...
Regards from South Africa
Find a amateur knifemaker near you. They use belts in all grit sizes and if you ask (they are a friendly bunch), I'm sure your blade will be as sharp as can be in no time. You might even get an order for a knife sheath!