We just installed a new Zip Dee street side awning on our 65 Caravel
. I gave Zip Dee the measurement from the rivet line on the front cap to the rivet line on the rear cap, and the color we wanted. They did the rest. Be sure that your clearance lights are not in the way. Window awnings are usually installed so that the arms are just outside the rivet line. I had to have mine made so that the arms are inside the rivet line or the roller caps would hit the clearance lights. They are made in 1/4 increments, any length.
We have one window awning that runs from cap to cap. Much nicer than two separate awnings. It came with full, easy to understand instructions and all parts and rivets needed to do the job. All I had to buy was sealer for the rivet holes. We spent about 1 1/2 hours measuring for installation. Measure two or three times. Used tape to locate the awning rail. Less than an hour to install. Just followed their instructions.
As for the patio awning, our Caravel had a Carefree Colorado when we got it in 2000. If I was to install a new patio awning. I would use the A&E by Dometic. It's the same as the Carefree. It is much easier to put up than the Zip Dee patio awning and the arms are much stronger than the Zip Dee. You will see many posts on this forum concerning bent Zip Dee patio awning arms. A slight bend and you are out of business. Nothing magic about the awnings on both sides being the same frame.
The Zip Dee window awning has bent arms to hug the upper bend in the coach side/roof. The A&E patio awning has a very nice curve to do the same. We didn't like the look of the A&E window awning.
Here is a photo of the window awning. Also, a photo of the A&E/Carefree patio awning in the rolled up position and one with the arms set out away from the coach.