Here's my low cost canvas top. Bought The Speedway motors universal cab frames: Made a plywood piece to fit on the Duvall screen (that is home made as well). After lots of massage and patience, I got the style I wanted With the frames still possible to collapse. Made a top out of masking tape to check. Did this 3 times before I was satisfied... Covered the masking tape top with thick plastic pieces that later became templates to cut out the fabric pieces. Got a professional to sew the 3 long seams across the rood, as my old cobblers sewing machine is no good for sewing long straight seams. Testing the fitment to check that the seams were following the frame: Rear window frame: Done!