I can't see how you'd go wrong with an Eric made sheath.
I recenty had a custom made knife built by RJ Martin. This was a one-of-kind design, especially with regard to length. Smaller than usual.
With this knife came a custom made "Kydex" sheath.
As a cop, I can tell you this much: I do not want this knife removed from this sheath by anybody..... other than me. RJ Martin has made fixed blades and sheaths for law enforcement many times.
I was amazed at the design of this sheath. When the blade is placed into the sheath the "snap" you hear (and you hear it loud and clear) tells you that this blade is not coming out easy.
If, in an attempt to remove the blade from the sheath by someone other than myself: the individual trying to pull the knife out would think that the knife was welded into the sheath. It's not going to happen.
Can I get it out?
Yes.....real easy. But I know what it takes.
Anyway: RJ Martin can make you a sheath.
And we already know about Eric.
Dan