While in many cases Ford Chassis items are kind of generic Ford parts, your RV's dash HVAC is a 3rd party supplied part installed by Winnebago. So you look up that part in the Winnebago 3D Parts Catalog > HVAC > Auto Chassis
Be aware that the part is different based on when your RV was manufactured. You have a model made later in 2019 and it has a different part number than if your RV was made earlier.
Here's a link to the parts catalog page for that part:
https://catalog3d.winnebagoind.com/2019/300109.htm
Here's a link to the online 3D parts catalog for your entire RV:
https://catalog3d.winnebagoind.com/2019/19wfe31be.htm
To get this part you can visit Lichtsinn RV's online parts catalog and order the part online:
https://www.lichtsinn.com/rv-parts/rv-parts-order
Other's here might know the brand of the manufacturer for the part and you could buy the part directly from the manufacturer.
Here's a screen shot: