I bought a cabriolet rear wood bow for my roadster thinking they’d be the same. Was completely the wrong size. (I can’t remember if too wide or too narrow .) A few years later I bought a convertible sedan and the cabriolet rear wood bow fitted perfectly. Anything could be made to work, but I wonder if you should wait to find the correct set? Dan.
If you’re coming to Hershey, I believe I have what you may need. I can’t positively identify all the different wooden bows, but the other wood I got with these was ‘35/6 roadster wood. I’ll be at Dennis Carpenters spaces.