Chasden, look closely at the design of that sheath. I have one of the small kydex Yard sheaths (no longer on the website) that fits the yard keeper and dumpster mutt knives. The design is the same as the 10" kydex sheath and I would not consider that design ambidextrous.

The sheath itself would be ambidextrous but not the belt loop. If you have skills molding kydex and could make another belt loop for it then everything else would reverse and work.