C&C Zero Hour Lost Disc 1

Hey everyone! I have a question. My little brother broke the first disc to Command and Conquer Zero Hour, I still have the other three discs and the original CD Keys, I was wondering if there is a legitimate way to get a copy by download or do i need to contact EA customer service and see about getting a replacement?

Contact EA and explain the situation honestly. Do it by phone rather than email, because emotions work better when spoken.