, in Brooksville, FL, sells awnings and toppers in both vinyl and acrylic. Here is a link
to a description of the fabrics they sell and their merits.
Bridget Throgmartin is the head honcho at Stone Vos. She suggested we replace our toppers with vinyl, as we are in an area where winter snow and below-freezing temps are common. Our coach stays outside and the first four inches of the toppers are exposed, so that's important. When the awning finally gives out, we'll probably replace it and the window awnings with matching vinyl, although acrylic is an option as these awnings are not exposed to the weather when closed.
The toppers have held up well. They only beef I have is that the "weave" in them retains dirt.