Dometic RM-2811 back cover plate

[Belle]

We have a 1978 Argosy MH and are replacing the Dometic RM-100 with a Dometic 2811. We got it used and it is missing sheet metal cover protection plate for the burner. It is the large burner cover (appx 11” x 11”) not the small burner cover. It is part number 293 07 85-01/5, piece 135 on the attached diagram.Does anyone have a 2811 (or similar model) that can send me a picture of the cover plate so I can make a new one? There does not appear to be anything unusual about the cover but the schematic picture in the manual does not show any detail (in fact, the diagram is a partially cut-away to show the drip tray) .

Our big concern is that the cover be sufficient enough to block any road wind from blowing out the flame.