Welcome to the Yard Yup!
We have a few sheath makers who post here. Check out buybrown and rainwalkercreations (google them)... Great guys who consistently make impressive sheaths. Rainwalker was looking into a aligator type clip for me but I haven't heard back from him yet. This might work for you but both of these guys have been open to suggestions and are very creative. I don't think it will be hard to find a solution to fit your needs with their help.