What I was thinking was to somehow modify the lanyard holes on these knives. I was thinking to have them threaded so they would be like a "barrel screw" and then have somebody that knows what they are doing mill two small notches in the bone handles to be able to accept a Spyderco wire clip.
If any of you guys out there have a Spyderco with a wire clip you will know what I'm talking about. I might try to take a couple of pics to explain if needed.
With such beautiful handles I really would prefer the wire clip vs. a traditional simply for the fact that the wire clip will obscure less of the handle.
I was thinking the easy way to do this would be to have the bolsters drilled and tapped but I greatly prefer tip up carry so that is why I was thinking of going with the modified lanyard hole method.