Gabriella's hood? (Dark Brotherhood spoilers)

[Yomnom]

So I've completed the Dark Brotherhood quest and I'm doing it again with a new character, and I've always liked the hood that Gabriella uses better that the normal Shrouded Hood you get. When I saw that she was dead during the imperial legion invasion I rushed to her corpse to loot the hood but alas, you can only get the robes, gloves and shoes. Well, I searched around the wiki and no mention of her special hood.
But I'd REALLY love to have it so, is there any way you can get it, is it unique? Am I missing something really obvious?

Sorry if this has been asked before, I searched the forums and found nothing.

[The-Shadow-One]

when you go in to the santcuray, you see the shelf beside the door to the main chamber? on that is the full set, and a maskless cowl.
hope this helps!

[Moirae]

More specifically, when you enter the DB sanctuary and talk to Astrid, to your right is a bookshelf, and on the 3rd shelf down is a bunch of misc DB equipment, as well as a book titled Sithis which will raise one magic school, though I've forgotten which.

[The-Shadow-One]

the book is on the shelf opposite the robes and that

[Yomnom]

Thank you so much guys! I knew I was missing something obvious, lol, I never notice things on the shelves /facepalm.