A former New York news anchor in need of a liver got a life-changing phone call this week thanks to a longtime viewer. Amy McGorry, 56, had been searching for a living liver donor after years of battling two chronic autoimmune diseases. The breakthrough came when the viewer, moved by the coverage of her story, stepped forward – and turned out to be a perfect match. “A true angel,” McGorry said about her donor in a video she posted on Instagram. The donor, a woman not related to McGorry, has chosen to remain anonymous. She underwent extensive testing before doctors at Weill Cornell Medicine confirmed she was a match and that she could donate. The surgery is scheduled for June. McGorry, who lives in Sea Cliff, said she got the call while teaching a health sciences class at Long Island University in Brookville. “I broke down and cried,” she told Newsday .…