Cary, I stopped at another RV dealer today. They have a 15/16" x 9/16" in mill alum that used the plastic insert strip. They wanted $42 for a 16' piece. All of the dealers in my area seem to be high. But, they also said that shipping for 16' pieces was very expensive. If I could cut it to 8' lengths, it would come by UPS. But, with 8' lengths, I'd have too much waste and it would take more trim. They had a piece that I liked in their catalog, but it only comes in a 10 piece tube, so they wouldn't order that just to sell me 4 pieces.
I planned on cutting to bend at corners, or just use individual straight pieces mitered to fit. Only the top front curve near the front will require much bending. I have a weighted rubber mallet that might do the job.