My Safari 25, purchased used, came with a piece of Sunbrella fabric that matched the awning (easy since it was solid blue) with snaps on it. I asked the PO what it was for and he didn't know. A year later I found matching snaps on the awning flap. Apparently the original owner had it made. You can get Sunbrella at an awning shop, have it cut to size, hemmed, and have snaps installed. A few dollars at a marine store such as West Marine will get you a snap installation kit. Or you can find a boat canvas company that can make the whole thing for you and install it.
"You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO
2002 Classic 30 Slideout
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
2001 Safari 25 RB Twin (Gone, but not forgotten)
WBCCI 1322, TAC FL-39, AIR 82265