There's no way I'd ever be able to dredge up my college board log-in credentials, but I certainly remember my exact SAT scores. Surprising that they want them, but I'll gladly give them up.
UCLA wanted my high school transcripts (go figure), but my SAT scores were on there. I believe CollegeBoard reports them to your HS, so perhaps you can call the registrar there.
I know last year it did not say if it was optional or not on the application, I couldn't find my scores anywhere so I just left it blank. Don't worry about it if you can't find them.