I've just uploaded the (probably) final update to the ItemRight-Music set in HeroMachine 3 Alpha, including:
I was thinking about doing a big floor harp, bagpipes, and a tambourine, but just couldn't get anything that looked good when drawn. So this will probably be it for now.
Next -- either Fantasy Armor or Rifles. Pipe up with which you'd prefer, and once we settle on one I'll make a separate post asking for specific items in that set you'd want to see.