This is just a lesser mod that I made.
If you're by any chance, familiar with my Vanilla Gear Redux project for Oblivion, this is something on the same fashion, but smaller, for Skyrim and it only covers the Dark Brotherhood armor.
I edited the vanilla meshes, added more verticles, and resculpted the whole thing in order to make a tighter fit and more elegant figure. There are some vanilla replacers for it already in existence, but I went beyond just "converting vanilla outfit to Bodyslide" and I did some more work on the details and terminations instead.
Installation is as any Bodyslide mod, you'll need the basic requirements:
XPMSE compatible skeleton
HDT, or BHUNP
PS: Textures are from Frankly HD Shrouded Armor