That could be done easily if the geometry had just two arcs and a straight line, but it has three arcs, using sandbox, curviloft or soap skin bubble will generate a better mesh.
I just finished the shape. It has three arcs. If I hadn’t posted on the forum at the same time, it would have taken me maybe 2 minutes.
This has a largish triangle hidden in the middle but I think it would still look OK in a render. To manufacture it you would need a “better mesh” but a plasterer would probably just trace the arcs and start building the shape from them.