On the lace up cuff design, I have seen it at least 2 places, from Chuck Burrows of Wild Rose Trading Co. Leather, and Ed Caffrey. I have no idea if one of them invented it or where they got it from. I think it may have been around a while.
When I get my grinder I am cutting the rubber off the Cold Steel and putting a nicer wood handle on it.
I may copy that blade shape as well. It has a nice outline to it, but it is like a sharpened pry bar. Needs a proper distal taper put into it. I will post a pic when I get a minute to snap one.