Would anyone care to speculate whether or not the the RC-5 SERE sheath would fit my Busse SAR5? I've got a SERE on order and a SAR5 with no pants! If the sheath fit both knives it would save me from having to buy one for the Busse. The SAR5 blade is 5" long, 1 3/8" wide and .188" thick with a 5" handle.