WTB fiery dragon sword with +15% dmg enchanted

so, the thing i want is: a fiery dragon sword that has the following mods:
+15% dmg enchanted
enchantements last x % longer (preferably 15%+)
i dont mind about the req and the dmg - ill buy even non-max dmg fdses too if they have the mods i want!

Don't know if you want one without the longer enchantments mod, but you can always replace the armor mod with one.. Asking around 20k if you want it.

<-- IGN