NEVER let the (proverbial) Cart lead the Horse. choose THE KNIFE that fits your needs, then get a sheath that allows you to carry the knife the way you want to. there are THOUSANDS of benders out there, i am one of them
2 Munkeez but if i can't build what you want, or if i'm backed up with orders, go to www.bladeforums.com click on "sheaths" and they have a sticky on sheath makers. there's SIX PAGES (possibly more now) of people who make custom sheaths.
i made a "convertible" for a friend of mine in the Coast Gaurd. convertible meaning the hole pattern allowed the tek loc to be switched so he could carry it horizontally or vertically, depending on his current need.
but really, and i'm not pushin my products (i don't need to), buy the knife you want, worry about a sheath later. you'll be happier in the long run.