I can't seem to find a Walker Mower Model t Muffler. It is the kind that drops down to the lower part of the engine. It's the flat type, most common I suppose. anyone have any websites in mind for a muffler. Tulsa and small engine wrhse don't seem to have it. Please help. PS, my local dealer cannot get it anymore??????Really???? need a photo, I can supply. thanks all !!