Have you tried calling Winnebago service direct? As they make almost every part not frame related, they should be able to get you one. It might not be cheap, but it will match and fit. They even have a 3-D model available online to help you identify the part for most model years.
Colorado '15 Winnebago Forza 34T w/MKZ hybrid toad '20 Jeep Cherokee Trailhawk toad