Sheath source for Boker Colubris?

[Jmoore1911]

While I lean towards leather - nothing against kydex.
If leather - prefer good, strong retention strap with tight snap.
EDC mostly, or in/on my go bag with my mags, FAK, etc.
Looking for good & reliable sources - preferably if you've had them do a Colubris.
TIA
geezer john

PS - don't care for the Boker sheath - too flimsy as far as attachment method.