What precisely do you want?
Arched or double arched windows with glazing bars?
Victorian style profiles for sills, headers, frames etc?
I have some objects that can achieve these and I vaguely remember Ralph Wessel built something similar to the profiler for odd geometries.
Creator of Cadswift's parametric GDL libraries
Creator of Infinite Openings and Component Catalogues
Push the envelope & watch it bend