If you go back to where you pick up the dragonbane there are 6 of them on a weapon rack on the wall, but they count as stolen. I took 4 of them and have double enchanted them and upgraded them to legendary. Dual-wielding them is sweet. Because a one dualwield attack is enough to take out anything except the very strong of enemies and also because there is a perk that allows you to speed up dual wield attcks by upto 40%, plus a further 50% power bonus. So dual wield beats two handed every time for me. I use light armour which helps speed also.