Not just Sumatra, but also in N. Peninsula (see silver coteng pic at the bottom), but the thing is that the form of the motif is not the same. In Sumatra/N Peninsula, the motif is fatter/rounder. Anyway, the hilt Alan posted has a style that does not seem to be from the Sumatra/Malay side of the Archipelago, but more of the rounder, more naturalistic forms I thought is usually found on the western side of the archipelago. Ok, this is my guess, but let's see how far off I am.
