The headline in my RV is a soft material stretched out. There is a hollow space that is large enough for speakers but there is no supporting mechanism. Each speaker would be just back of the visor in the up position. I found rigid molded OEM on ebay but I need to see if it will go back far enough to replace the soft material. Going to go by Ford and look at new models to compare.
If that fails I may try to fabricate something out of wood, then buy the same material to provide a finished look.
__________________
|