How about a thick kephart--large and stubby versions. A 6.5x2" blade and a 4.5x2 blade--.25 to keep it nice and solid (maybe 3/16th on the shorter model). Could work with either resipr-C or with micarta under the Swamp Rat line. Nice satin finish SR-77 or INFI steel. Of course would need the full convex grind.

Or how about a nessmuk with mudder grips? Oh wait...dang it!