I will have to recommend Rainwalker for such a need. I worked with Jeff to come up with the following implementation...and he executed on them flawlessly. The following show SYKCO blades, but if he has the knife then he can employ the concept onto any of the smaller Busse (and kin).
I wanted leather, because I like the way it rides against the skin. Additionally, I wanted a way to add Comp-Tac Clips to the sheath to allow for shirt tuck in (I wear business clothing, so during the week I am 100% tucked).
I EDC the SS4 the most, but the Scrapivore gets the call often.
Don't mind the gut, and painting clothes

This first pic shows how the knife sits IWB and the clip connects to the belt.
This second pic shows how the shirt can be tucked between the sheath and the Comp-Tac clip. Works VERY well. The clips can take approximately 1 Million flexes...if I recall correctly. They are available through Comp-Tac...or you can just ask Jeff to supply them when you place an order through him.
Just for transparency...I also have a few kydex sheaths for the SS4 with different IWB setups. They also work, and you can add the Comp-Tac clips to any kydex sheath (with appropriate spacing) as well. However, it's personal preference, and I prefer leather for an "all day" carry.