A good possibility for a track for the awning
is the same as has been used for years for the main awning
, the aluminum tracks are available in 2 or 3 designs and some are even a nice white in colour with a small rain channel. Should be available at any RV supply shop. Here are some pictures from the Coast Distributing catalogue
With these you just need to make a rope hem in the top edge of the awning
and put a lower hem in to support the fiberglass rod and as was prevoiusly suggested, the trusty old bungee cords hooked to the belt line for tension against the wind.
If there were multiple windows
on 1 side you could just put a single track the length of the trailer, then fit the 2 or 3 custom sized awnings in the same track, this would give a real tidy and organized appearance.