Larry King is eager to be a guest on the show that racks up ratings from spoofing the CNN talk-show master. When he visited the set of “Saturday Night Live” earlier this week to tape interviews airing tonight with Fred Armisen, Lorne Michaels, Amy Poehler, Kristen Wiig, Seth Meyers and Andy Samberg, King gushed to show producers about how badly he wants to be on the show. King begged Armisen to do his repertoire — lapping up his David Paterson acts and giving tips on the spoofer’s impressions of himself.