Mashed cat makes a great danler, thigh rig. Al werks makes great kydex too I highly recommend him as well.
For leather Dwayne at armor all leather , chuddy bear, and rain walker make awesome sheaths.
Here are some pics for you, front and back so you can see attachment points.
Kydex you have my Mashed cat thigh rig for a Ash 1. it is adjustable for carry length. A top quality sheath
my B11 in a Mashed Cat and my BWM in a fantastic Al werks kydex sheath
you will probably want a pancake style like the desert camo Al Werks model in the above picture, for more attachment points instead of the taco style. The taco style is more compact.
Here are two of Dwaynes leather sheaths, both great attention to detail and fit. Im sure he can make a thigh rig for you as well.
And here is my Chuddy Bear dangler sheath. It is a well designed set. It holds a Warden knife behind the altoids case holder and is a little heavier than kydex but feels reassuring. It also has the fire steel loop on the side.
All of these have great retention and attention to detail. There are other makers out there making great products im sure but these are the ones that I highly recommend. any of these makers will serve you just fine.
Good luck and let us know what you get!!!
And here is a pic just because I think its awesome