Do an ebay search for audiozones store and look at their leather case for sony PRS 600.
I just ordered one of these at the weekend…just over a tenner inc delivery and it should do the job. It comes from Singpoare apparently, so will likely arrive early next week. I know you tend to get what you pay for but I think the £50 they ask for these on the likes of play.com is just ridiculous!
Anyhoos, once it arrives i’ll post my verdict! Can’t really grumble for a tenner, like. I’m just hoping it doesn’t get stopped through customs! 🙂