Thought this looked good but could not find any reviews,will let you know how I find it when it arrives, this is Dispatched from and sold by Prepaymania but is £5.40 more on their own site!
HTC One X Clear Hard Shell Case with Flip/Stand - White
The HC V701 shell snaps onto the back of your One X and is made from a tough polycarbonate which protects the back of your One X from accidental bumps, scrapes and drops. HC V701 features a white flip on the back of hard shell, it can be folded on the back and to be used as a stand, so you can watch videos or other media comfortably.
The case is an official HTC product; as a result, it features the highest quality materials and also precision cutouts for the various ports and features of the One X itself which means you won't have to remove the phone from the shell to use it.