Do you want a permanently-attached, roll-up awning? Do you want the kind that slides in the awning rail and is held up with poles and ropes like the old-time trailers?
If you want the roll-up type, you are pretty much limited to Zip-Dee or Carefree, and you'll have to look to find a CareFree dealer that knows how to order the curved hardware for your trailer. Neither are cheap, the CareFree is slightly less expensive than the Zip-Dee.
There is a forum member that advertises the slide-in type awnings in the Forums classifieds in the specialty services section, and they are about $300 or so, but do require more effort to set up.
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.