Does anyone have a clue what kinda of aluminum liner Phill Hartsfield uses in his sheaths? Appears to be lined in paper that seems to already come that way in a roll of some sort. Aluminum flashing with paper back that is glued on there extremely well by the manufacturer? I love how it makes for a good friction fit that doesn't cause any scratches on the blade finish. Does anyone know if any other maker makes a sheath in this type of way?