Winnebago 2006 Ripped awning?

Hi my awning on a Winnebago sightseer 26p which is 11'6" long has been torn on its upper and lower edges, where the awning meets the roof and also where its attached at the bottom, its torn away from the beading in both places. (I suspect its been left out in a high wind). I need to know how to remove the awning sheet and any suggestions about where I can get the sheet restitched.