OMG, where did you get that bag? It's amazing! Anyways, if you want a look-alike option try the Knomo Slim. It has a black quilted exterior and it even has "Chanel-burgundy" interior so it kind of looks like the colour-scheme my 2.55

If you have a 15" look for the "Knomo Slim 15" - it's SUPER affordable ($79) and really great. There's also a 13" option. It's really slim and sometimes I shove it into my LV Icare, or whatever tote bag I'm carrying that day. Each bag has a unique ID tag so you can "register" it and in case it goes missing someone can return it to Knomo, who then contacts you. I like to carry mine by hand but it gives you a strap option. I'm not gonna lie, I heard about this brand because I saw this on none other than Ms. Pippa Middleton.
http://www.knomobags.com/usa/slim-medium-laptop-case-15-black-2.html/
BUT! If you do happen to find something that works as a laptop bag, let us know and post pictures! Curious to see!