I'm thinking, why not make a cane from steel? Take a stainless steel, round or square stock, cut off a 30" or more chunk and have a machine shop tapper the shaft down to save weight and give it some shape or design. If your near someone with a forge to heat, bend, or hammer a handle shape (figure more length for a crook type handle) then heat treat, add a rubber tip, leather wrap the handle for vibration in case you might "bump" something and it sounds like a tuning fork. If Damascus comes in rod stock, me thinks that would be one cool looking cane. I think it would be perfectly legal, after all if it looks like a cane, it's a cane. Right? ;-)