You're talking about the Sword Handle Umbrella and the Claw from the Femme Fatale collection. I have a quest right now to find the Combat Fan from that same collection, and it says it can only be found in the dressing room when the Will-o'-the-Wisp phenomenon is in it. So the other items in that collection may be the same.
What I don't know is whether those items are available only when the quests are open or if they remain available after that, but I'd try looking in the items list when you get phenomenons in different rooms, especially the Wisp. Otherwise, you may have to put them on your WL and hope someone will gift them to you.