Another decent cheap sheath is the Cold Steel Bowie Bushman belt sheath. You have to get the wider Bowie version, not the regular. It fits everything from ASH-1s to SODs to NMSFNOs decently enough, plus has a handy front storage pouch. It’s made of Cordura and has metal rivets and vinyl trim. Cold Steel used to sell these on sale for around $8-9, but I haven’t seen them in a while. I have 3 and could use a couple more, so I have my eye open for a CS sale.