Also, that's not a replica of a roadster body, it's what's known as a cabriolet. Sloppy people will say something like "no difference", but tuned in folks recognize the differences. Roadsters have the separate windshield and no side windows. Cabriolets were higher featured bodies with fixed windshield frame and roll up side glass and a more substantial top assembly than roadsters. It's very difficult to identify manufacturers of glass bodies since there has been a lot of "borrowing" over the years because it relatively easy to splash a mold. The one notable manufacturer who did a cabriolet body was J.B. Donaldson in Arizona, though my memory wants to think the windshield pillars had a tad more lean back than those in your pic............but I could be mis-remembering.