Alan,
I used 4-in x 4-in x 3-in dia PVC Sanitary Tee Fittings with the top part and ends cut off - makes a perfect saddle for the awing roller. A pair of reducing bushings allows the 3" opening of the T to fit onto the top telescoping pole.
The telescoping poles are 1.5 and 2.0 inch Schedule 40 PVC - I bought a ten-foot length of each and cut each in half - the inner section has a series of through-holes drilled every 1 inch for adjustability - the outer section has a through-hole - a pin goes through the holes to set height depending on awning height and ground level.
The base is a bushing fitted into a 4 inch aluminum foot.
All of the PVC is Schedule 40 PVC.
Ratchet straps are looped around the the outside part of the T-fitting and cranked down firmly to anchors in the ground.
I'm not sure how long the Schedule 40 PVC will hold up to the Florida sun but time will tell...
Mike