It's been quite a while since anything new has become NPC storable. I think this or last update added some Rare/Ex furnishings or something?
How about the Rare/Ex sets from Campaign? The Cobra Unit, Iron Ram, etc sets?
How about the Perle, Aurore, and Teal sets just introduced? I don't know if those will end up being the Trial of the Magians upgradeable armors we were promised at Vanafest or not, but if not obtaining and being able to toss a whole set into storage sure would be nice.