Hey kewl, nothing wrong with a bit of modding
Why don't you go looking at case mod sites? and maybe make your own computer case? This will give it some personal feeling, and you can make them using MDF or metal, your choice.
You could then make stickers yourself, but you could model the case however you wanted. What do you think?
I wouldn't mind doing this if I had the time
Much better than buying one in my opinion.
Look here for a bit of explaining and some inspiration:
EDIT: Opps...didn't see you had a laptop
You could probably still make one though if you wanted