Last Thursday, Claude Fenstermaker, 67, of Slatington R. 1, leaped into a pond to rescue a two-year-old child who was the victim of an auto accident. It was through his efforts that the child is alive today. Fenstermaker lost his wallet in the ordeal and hasn't found it. It had two tickets to the Music 500 at Pocono on Sunday. Joseph R. Mattioli III, vice president and general manager of Pocono International Raceway, heard of the problem. He phoned Fenstermaker, giving him and a guest VIP treatment at the race.