First deal! be gentle...
Been looking for one these for a while, just come across this one on Amazon, cheapest i could find online £36.99 including free delivery.
Works with the following HTC devices:
HTC One / HTC One X / HTC One X+ / HTC One XL / HTC One S / HTC One SV / HTC One V*
Seems like the link takes you the generic page for the product, click on '9 new from £36.99' and select the one with the correct price.