So, without spoiling anything, near the end of the Dawnguard questline you get an opportunity to acquire a set of Ancient Falmer Armor. However, while it does have pauldrons, it doesn't really have any sleeves... could an intrepid modder modify this slightly to add these by any chance?

That annoyed the heck out of me when I got that armor. No wonder those filthy falmer lost everything, if that was their idea of armoring