The only reference to a sword from West Sumba that I can find is in The legend of the people of Wanokaka in the village of Wai Wuanga about the PASOLA WANOKAKA. In the legend one brother has to repay the other everything that he had payed for the wife that he stole from him. One of these things was a sword (pahori). So far I have not been able to find any other information on the term pahori

or this sword. For those interested here is a link to the story
http://www.petra.ac.id/eastern/ntt/wstsumba/pasola.htm
Robert