I have seen swords that appear to be made from a saw fish... this sword is made of shark teeth set into wood. These are still up for sale in places like the Republic of Kiribati (Fanning Island or Tabuaeran), sold as a souvenirs (these are not very functional). I was told, at one time... they were actually made for functional use. I have to be careful handling mine. oouch!
There was an earlier post on an auction that looked like it was made from a saw fish.
http://www.vikingsword.com/vb/showth...highlight=fish