When Hampton coach was in business, you could simply order a new roof kit and install it yourself or find a good trimmer to do it. With them gone, roof replacement is much harder. If your roof is in decent shape other than ripped, a good canvas shop should be able to disassemble your roof at the stitches, use it as a pattern, and stitch you up a new one. While I’ve work on a few old cars now, I had never done an antique roadster or Cabriolet before I installed the roof on my 32’ Olds. My roof came out very well and there’s no reason why most people can’t do it themselves if they already in the process of doing other restoration things on their car. There are still some HC videos on the net that show how to install a roof on a model A roadster and it wouldn’t be much different on the Chevy. Taking many pictures of the details when you remove your roof and looking at other roadsters would help you install your roof or you could have a trimmer do it all. If you do attempt your roof, don’t waste your time with an electric stapler. By an air stapler and use 3/8” long SS staples. You will also need some good old tack and a tack hammer for the reinforcement webbing used in the roof upper corners.
