(NEWSER) – A devoted husband's determination to find the new kidney his wife desperately needed has paid off. Larry Swilling, 78, walked hundreds of miles around South Carolina over the last year with a sandwich board reading "Need Kidney 4 Wife." He says a donor has finally come forward, and he believes it is someone who was tested for donation after news of his quest appeared in the media. His wife Jimmie Sue, 76, was born with only one kidney and it began to fail last year. Swilling began his search after learning he and the couple's three children all had the wrong blood type to be donors.