Hi Ray! Welcome to the group!
The problem with adding awnings to older fiberglass rigs is two-fold:
1. The brackets holding the awning
need to have the right angle-of-dangle or the awning twists ever so slightly, and doesn't corrent retract and extend. (Most awning manufacturers engineer their awnings to be put on right-angle, stick built rigs, not on the aero-dynamically curved roof line of our fiberglass wonders).
2. Mounting the brackets requires a little fiberglass reinforcement so that the mounting bracket bolts don't pierce the shell. Manufacturers found that awnings cases vibrate going down the road ... and awning flap around when extended, causing vibrations to travel through the bolts, eventually breaking the caulking seal and leaking into the rig.
Burro's shell within a shell, I think would be even trickier to install an awning "after-market."
I know it took both Scamp
quite a while to perfect awning installation techniques and properly angled brackets.
You'd probably be best served with a free standing canopy.