I am missing 4 shoulder bolts that attach the plastic shroud to the engine. I ordered some using the Briggs & Stratton Parts Diagram but the part that I received was too big (see attached image). I returned it and continued my search but ALL the parts companies that I tried did not have the correct size part, including the Briggs & Stratton OEM supplier. The correct part has a 1/8" high x 3/8" shoulder on top of a 1/2" long 1/4 x 20 threaded screw yet ALL the replacement bolts available have a 5/16 18 threaded bolt. Does anyone have 4 of these bolts that I can buy?