Or for a bit less cash and no mucking about you could get this
http://cgi.ebay.co.uk/ULBLACK-EVA-ARMOR-HARD-CASE-FOR-SONY-READER-PRS-600-600_W0QQitemZ350307879012QQcmdZViewItemQQptZUK_AudioElectronicsVideo_Video_TelevisionSetTopBoxes?hash=item518ffa0864