My preferred solution is the Tek-Lok belt clip. I use them on all of my ESEE sheathes. They can be attached in four different positions at 90-degree angles. Just set it up for a horizontal position, adjust it to the width of your belt, and you've got a solid no-fuss carry.
Got it off Amazon after searching for, “leather ESEE-4 sheath.” The knife sits a little higher than I’d like but overall it works. I put the link below.
ESEE Brown Leather Fixed 3-4"... https://www.amazon.com/dp/B07B8X52WF?ref=ppx_pop_mob_ap_share