I've been told by Greenreader that this is a non warranty fix and it will cost around £125 to repair
This seems like throwing good money after bad - its virtually the cost of buying another ereader and the fragility of the plastic shell means that it could easily occur again. It's for a very good reason that companies like Sony use a very rigid metal chassis.
I would definitely advise against buying this product unless you are going to keep it in your house and handle it with kid gloves - so much for being a portable ereader!