The canceled soap operas All My Children and One Life to Live may yet have another life to live on television. After originally announcing that it was trying to find a new home for the long-running shows on the Internet, Prospect Park, the company that now owns the rights to them, was reported to be shopping them to cable networks. Dateline.com, which reported the development, said that the company is talking to both cable networks and online outlets. It is also talking to various unions about getting a break on minimum rates. Each show reportedly costs about $50 million a year to produce -- which is roughly about a quarter of what Hulu, the principal outlet for streamed television shows, earns for all of its programs from three broadcast networks and numerous cable channels.