Collectorknives still has a Schatt & Morgan File & Wire cotton sampler with the big sheepfoot style blade in ATS-34, which should hold an edge significantly longer on cardboard and plastic than just about any other stainless you will find in a production traditional folder. Also has a lanyard hole and some beautiful bone covers, just over 4" closed.
http://www.collectorknives.net/schatt-morgan-file-wire-moss-green-wg-bone-cotton-sampler/
It is a lovely knife that holds a very keen edge
