The mini hasn't been released yet. This is a prototype, painted by the amazing Jen Haley in a color scheme to match her gorgeous versions of Jaime and Cersei, which can be seen below.
You can order your own Dark Sword miniatures at http://darkswordminiatures.com/
And Jen has her own website at http://www.paintrix-miniatures.com/ where you can see a lot more of astonishing brushwork. She takes commissions, too.
Comments welcome, but only about miniatures, painting, and Tyrion. Please stay on topic.