I need the cowl & windshield for a J3 Cub. These parts were missing from kit purchased 6 years ago from www.nitroplanes.com/piperj3cub15.html . Cub has a 50" wingspan. The windshield is approx 3 3/4" wide at the top. Cowl opening is approx 3 1/8" wide X 3 3/4" tall.