i ended up with the timbuk2 sleeve for my k2 and i love it! it closes with velcro so i don't need to worry about it opening in my bag when i'm out and about. inside is super soft micro fiber so it's extra gentle on my kindle. here's a link to it on amazon:
http://www.amazon.com/gp/product/B00...&s=electronics
comes in 3 color variations - looks like black is in stock right now...
k