My 1870 Second Empire house has entry doors in a custom shape: essentially a rectangle with a t****zoid on top.

Given the skyrocketing price of home heating oil, I would like to tighten up the house with custom storm doors.

The problem is that the vendors I have contacted only do custom sizes, not shapes.

Can anyone point me to a vendor who can fabricate this shape? (Local to Boston would be a big plus).

Thanks for any guidance.