http://www.sfbags.com/index.htm These bags from waterfield designs are really nice. Snug fitting, with good protection. and a nice sleeve on the outside for papers/mouspad etc. I use it in conjunction with a Timbuk2 Messenger bag. Also their customer service is second to none. really really nice people, I recieved an automated response to my order, followed quickly by a response from a real person, then subsequent communications once i had recieved the bag, asking how it was, and if I needed anything else. really nice people and a fair price for how sturdy these are.