Knife Sheath/Holster Help?

I need help finding a suitable holster or sheath for my knife. It is a Smith & Weston H.R.T. and here is a link to the amazon page: and the exact model # is SWFL1 and here is a link to the amazon page: http://www.amazon.com/Smith-Wesson-SWFL1-Point-Serrated/dp/B0001WC85W. I am haveing trouble because S&W doesnt manufacture a holster for that knife and it is a large folding knife. Thanks for the help!