Ah yes Jose, i would definitely agree that the sheath is contemporary. In fact we know it is since Mickey had it made to order.
To answer your question, i am fairly sure that keris of this quality have not been made On the island of Bali for some time. I'm not quite sure where all these higher end contemporary Bali-style keris that keep popping up on eBay are being made. Either Jawa or Madura i would imagine. But i don't believe that there has been much high end keris production on Bali since the before WWII. I would be interested in any evidence to the contrary.