Both of them came up MIB in that seller's auctions but both went for rather silly prices. I think Taffeta was almost $800...and I hope that isn't going to impact on the loose accessories of this set.
You're right that those two don't come up much in terms of accessories, though admittedly I haven't really looked for them lately. I did see someone selling one of the other clips for around $30 though not so long ago. I think it might have been Dawn's?