no I actually find those very difficult to obtain, there is one now at a dealer for 395 dollars and another much cheaper one (low quality) for 125 on another website, if I had a top quality mandau I would probably buy the side knife for 395, but my mandau are pretty low end right now , it is extremely interesting though, the magic especially the complex head hunting beliefs of the various tribes in the archipeligo plus near india, its really interesting stuff.
Like one tribe of the dayaks believed you could not get to paradise unless someone cut off your head, and the other spirits formed from the holy division would ward off bad spirits if you welcomed them into the village as equals ( they would light smokes for them and put them in places that are pleasant to look at )-- they actually prized children's heads because it showed your prowess of getting past the parents and child spirits were especially powerful at crop growth, as they also believed you needed a strangers blood to grow rice, and they would leave heads in the fields with arrows through the eyes to keep the spirits pinned to the field.
on the older mandaus actually used for headhunting, the blades would be reforged for kills, with punched holes in the back of the blade, and they would put gold or brass or copper plugs into these holes representing the soul of the person taken by the blade, I have seen some with well over 100 plugs...