If you would feel better with a guard protecting your hand a little from slipping forward.
Perhaps you might ponder this. Bend a nail into a “U” shape. Drill a hole (same diameter of the nail) in each of slap handles, forward on the handle. Epoxy the ends of the nail into the holes. That’s the general Idea”¦. One can adjust to using a nail, brass rod, metal wire, hole depth desired and size (width or length) of the “U.”.