Christian Dior will launch Les Élixirs Précieux, a new collection of four perfume oils inspired by the Middle Eastern practice of fragrance layering. The four scents, Oud, Ambre, Rose and Musc, are meant to be layered with the La Collection Privée Christian Dior fragrances.
I do not know if Dior will distribute these outside the Middle East; I will update with more information and sizes when I can.
Update: The Élixirs Précieux are now shown online in the US Dior webstore, 3 ml for $300. The Oud Elixir is meant to layer with Gris Montaigne.