Do unibody hard cases fit pre-aluminum macbooks?

I have an Incase hard shell for my 13" black macbook. I bought my computer in November 2008, right after the aluminum laptops were introduced, so as to save money. My hard case has held up nicely, but I just noticed that some of the holders (the things that hook to the top cover of the computer) have broken off so it's getting loose. I am having a hard time finding any cases that are for this particular model (like...no luck at all). Do the unibody cases fit my model? Or does anybody know where I can get a good hard cover (preferably blue) for it? I appreciate any help you can give me. Thanks!