I went with Classic Tube. Fit great, with very little hand forming except where the straight runs were too long to fit in the boxes. In those cases, it was easy to straighten them out. I bought stainless for my '40 wagon. Mild steel is also available. It came with all the correct shielding, hold down brackets, fittings, etc. A pleasure to install.
https://classictube.com/
I would never go to C&G for anything and they are in my backyard. All they do is supply Carpenter and Drake stuff.