The two reality telepix from CBS News series “Before Your Eyes,” “Christine Is Missing” and “A Heart for Olivia,” have been critical successes as well as big moneymakers for the network. Now Wired hears suitors are courting the series’ executive producer, John Klein, whose contract with the Eye web is up this month. Among those vying for Klein’s services are ABC News and the Alphabet web’s new partner, DreamWorks SKG. Meanwhile, according to Black Rock sources, CBS/Broadcast Group prexy Howard Stringer is using all his charm to make sure Klein stays in the fold. Klein declined comment, but his colleagues say the odds are 50/50 on whether he’ll stay or go.