New Rory's Story Cubes: MIX sets

I've known these were coming for quite a while, but just heard that they were purchasable during the UK Games Expo recently. So, has anyone seen them elsewhere?

From the official description:

Each Rory’s Story Cubes MIX set contains 3 cubes with a particular theme. They are designed to extend the play of Rory’s Story Cubes. The first three sets in the series are Rory’s Story Cubes: Enchanted, Rory’s Story Cubes: Clues and Rory’s Story Cubes: Prehistoria. Simply mix them up with other Rory’s Story Cubes to conjure up fantastic fairytales, craft tales of cracking crime or weave tales of primeval predators.

WANT!