I use a Sharpshooter sheath system Bushcraft "C". It's not a tight fit but I have added a lanyard, and loop it around the firesteel to keep it real snug if it's getting thrown in a pack.
http://www.knivesshipfree.com/product_info.php?cPath=489_625&products_id=2008
You could easily wet it, and snug it up by boning it! Super easy to do.
For Kydex, BuyBrownHolsters.com Our own David Brown makes my favorite kydex. I also really like Mashed Cat sheaths, Alzweke makes a really solid sheath. Okuden and several others like SteelNut have a great reputation (I have never owned those last two, but have heard nothing but great things.
For leather,
Chuddy Bear, Letherman, mikeymoto? etc all great. SBranson (although I don't know his back log, He makes great leather).
For EDC I use a pocket sheath with a clip. I make my own crappy ones. But I really like the deep carry front pocket strong side. Knife is unobtrusive, but ready, and it is open carry.
I have made 4 versions of this sheath for different EDC sized ranging from GW, SS, AD and one pancake for a home made knife.
Middle AD sheath, and the top Pancake one with the green scales are both clip sheaths.