I have a 13" white macbook 3,1 (Intel Core 2 Duo) and I would like to replace the topcase piece. I don't care if the replacement is white or black--I'd kind of like to put in a black one--but I'm not sure which version to buy, as I keep seeing two different models available on eBay. Apple has replaced it all twice for me in the past, but I know I can do it myself and don't really want to shell out $250 bucks again. I have a finicky parrot who sometimes gets ahold of the keyboard when I'm not looking, so this isn't really about the topcase cracking, although the right corner has cracked on all 3 topcases I've had thus far. I was hoping someone could help me out with the model I need to purchase--and any other tips, if you're willing. Thanks!