Hi gang. I am looking for the scope knobs for the old OL-1 3 inch scope. I need 2 of the small gray knobs (PN 462-20) and 4 of the larger gray knobs with index mark (PN 462-19) . If you have any, let me know or , if you know of a source for old Heath parts, let me know also. Thanks, John kd6pt a