I got a padded sleeve/case on Etsy. I got this one:
http://www.etsy.com/listing/61503753...ader-sony-case
I just put in the message that it's for a Sony PRS650 and she made it to the exact dimensions. It fits perfectly. There are lots of different fabrics (all of them quite girly). I also really like the sleeves by a seller named "Rogue Theory" but I wanted one with a velcro enclosure at the top. I have been using a sleeve with no strap at the top for my ipod and sometimes if I pick it up by the wrong corner, the ipod falls out.

no bueno.
eP