Hello
I am also looking for the legendary weapons and I have 2 of the 3 you require. Unfortunately I do not have spares of these but can loan them to you while I look for a new set of Legendary Weapons on my second play through using a different save slot.
I have the Cutlass and the Chicken Bane but if you are patient enough, I'll let you know if I have found the third weapon on your list.
