Also, when in the Dawnstar Sanctuary when you are hunting down Cicero, on a cupboard near a mid-sized circular room (under the bridge) there is an unenchanted set of Worn Shrouded Armor (correction: the only part of the set that
is enchanted are the Worn Shrouded Gloves. Everything else is a blank canvas, most likely placed for all of the Enchanters out there...).
In Hag's End you can get the Ancient Shrouded Armor, but only if you perform the preceding Contract for Gabriella and do it perfectly so that you earn the Contract Bonus.
And lastly, If you thoroughly search the Pine Forest (Falkreath) Sanctuary both before and after the part where Commander Maro's men are slaughtering the Dark Brotherhood, you can find pretty much another complete set of the armor, plus another set of the Shrouded Robes, Shrouded Shoes, Shrouded Handwraps, etc.
I've got pretty much two full sets of everything except for the Worn and Ancient Shrouded Armors. I think those two are unique sets of armor in the game.
Hope this helps OP.
Hail Sithis!
