where in the world do these drop??

リア／エレガイクサ
レッグ／エレディアル
アーム／エレギスター

I've been looking thru all the quest item stats thing and can't even find one instance of them dropping, yet I've been seeing people running round with them+^_^+ of all the armor out there, these so far are the only ones that fit Mary's outfit (barring wings of some sort, but haven't seen any good wings yet, just those weird clipped and disproportionate gold/purple ugly ones)