In July, I managed to break a front awning arm on my Dometic Weather Pro electric Awning. (2009 Adventurer 35A). Winnebago parts manual and Cust. Support both pointed me to Dometic who was absolutely no help. They no longer support this model.
Won't be buying Dometic anymore.
I managed to find a great awning resource:
New and Used RV Awning Parts
This is a company in Oregon that specializes in used awning parts. Give them a call if you need parts. Otherwise, you are looking at a complete new install.