The 7" sleeves are harder to find on Ebay for dirt cheap. I got mine for 1.19 shipped a few months ago. It's not snug, but not overly baggy either.
http://tinyurl.com/6brggwu
would fit nice
Make sure you get a 205 x 145 mm one!!! not the other 7" case that some sellers sell on ebay (that one is way too big).