There are some great Kydex and Leather sheath makers here. Rainwalker made me a nice leather sheath and can provide you with a great looking kydex sheath as well.

I use both kydex and leather. I prefer the look of leather but the functionality of kydex.

As far as Kydex being secure, yes it is secure and when the tension is set properly, it can be carried horizontally. In addition, straps can be added to the Kydex sheath to make it as secure as it gets if you are using the sheath for rappeling or just need the added security.

Good luck and Welcome to the Yard John.