On my old '81 Formula 233LS, I had the factory top for it. It was in pristine condition and had never been used. Still in the factory wrapper 25 years later…
It was made by a common top provider like Sunbrella or Taylor. I don’t remember exactly which one it was, but it indicated that even then, the factory, though high quality, used off-the-shelf solutions from other common manufacturers of stuff like that.
I imagine you'd be fine to seek out a top that fits from the mfgrs that make them and get the best one they make, as Cobalt did.
