I can find many sound websites for libraries about anything and everything non-vocal, as well as sites that focus on vocals for use in music as well as actually recorded public announcements at airports or train stations.
What I'm looking for however, are vocal soundbites like a commercial or fictional PA. For example, the famous "a new life awaits you in the offworld colony!" from Bladerunner, or fragments from commercials from the fifties. Or recorded sentences used in a techno soundtrack. What about sentences, shouts, short conversations, walla in a made up language?
I basically can't find anything like that. Do libraries like that even exist? I'm looking for some spoken soundbites to complete my futuristic background design.