Here is what I have so far. It holds the knife well but is pretty difficult to remove and put back. Im going to grind a bit off of the opening.
https://drive.google.com/file/d/0Bxh...w?usp=drivesdk
https://drive.google.com/file/d/0Bxh...w?usp=drivesdk
I will check out the link you gave me . Thanks Alex!