Tribal Thunder has produced a Hank-Drum derived instrument. Each drum has 6 notes, in a pentatonic scale. It looks like they are possibly welding the tops of two propane tanks together to make a much shorter (about 9" tall) and easier to handle drum. I really think that they have done a great job developing this instrument. The paint colors are awesome. You can play it with either your hands or mallets.
Cost is $400.