If you email EA they send you new ones - i think
Google it. If you have actually bought them your conscience shouldn't hurt.
I'm not sure if EA has anything like this, but in case anyone asks for any other games I know Blizzard has a program that takes in manuals for WC3. It's like if you lose your cd case for say, Warcraft III ROC, then since the booklet is pretty big and hard to forge =P they have a program where you can mail it to them and they'll sell you a new cdkey/cd for a far cheaper price of $5. (which probably about covers there shipping and cd cost anyway) So you can ask around for EA to see if they have anything like that.