In his 'Arms and Armour of the Crusading Era, 1050-1350: Islam, Eastern Europe and Asia Vol 2', David Nicolle refers to a sword from the Army Museum in Istanbul which is attributed to Salaheddin. Nicolle himself however has doubts about this saying he believes it is actually 13th or 14th century. It is a straight sword by the way.
I knew I had read something somewhere about a 'Sword of Saladin' in Istanbul!
BTW I don't really recommend the book, it was a disappointment. No photos at all, just line drawings.