I bought my kindle touch a couple of months before they released the paperwhite....that irritated me! Anyway I have a clip on light, but really want the cover with a built in light. I don't think they make them any longer though.
Currys website showed them as being in stock -I turned up and it was for the keyboard version. I bought one on eBay a few months ago and was a fake. Terrible quality and I hate it.
I have one at home, somewhere, that's no use anymore as I got the paper white. It's the purple one, you can have it if you want. I'm in hospital at the moment so might not get to a post office for a few days!