Check this out on AMZN: ikross Durable 360 Degree Rotation Car Mount Tablet Backseat Headrest Mount Holder for 7 ~ 10.2 inch Table...
http://amzn.com/B0085S0838" rel="" target="_blank">http://<a href="http://amzn.com/B008...B0085S0838</a>
I like this one because you can keep your otter box or whatever cover on it when you mount