BELATED but among the various bloodletting weaponry, think Amos might be able to find a pair of shobo or Emei piercers? These are basically hand-held weapons, made of wood or metal with a ring on them to help them stay in the hand, used for poking people in uncomfortable places like important nerve clusters and major blood vessels. The shobo tends to be thicker and more substantial than the Emei.

And if not, well, Amos'll just grab a few extra knives. XD