I found these via extensive web search, and looks like the only option OEM unless go
through dealer/Manufacturer...ignore the link text saying stainless-steel-plate,
it is the correct link to the screen door sliding panel
https://www.challengerdoor.com/produ...s-steel-plate/
I was told by the below to contact him directly to order.
John Sellers
Parts sales
(574)-773-8106
Lippert 148
www.lippert.com