Welcome to the Yard! The link in my sig has a list of all known sheath makers.

The nylon sheath in the store has a folded clear plastic insert. It attaches to the belt with a nylon loop. Here’s a pic of a similar style sheath for my SRKW M6:



Here’s the sheath I got for my DFLE, from Buy Brown:





I think the most comfortable type for the longer ones is the dangler style: