well, there's the Taiwanese/Cantonese knife that's got an eggplant shaped handle and a bamboo leaf blade. There's a man in Shih-ling area of Taipei, Taiwan who still makes them. I hope to acquire one, but he makes only one a day and is backed up with orders.
The website might be temporarily down..
link
another good site for to see it is
here
there's also Uighur(?) blades that are on this
site ...which may also be down