These pencils are available...
These pencils are available in the U.S. They're called "Pilot neXtage". The
shaker is a little more weak than let's say the Pilot Dr. Grip ones; that means
you need to shake a little harder to advance the lead. When I first used it, the
shaker mechanism jammed a lot, but that changed after using it for a couple
weeks. It's great if you like to click your clip and not breaking it off!