Good morning, I am trying to flatten an ellipse sheet metal band. I have drawn it multiple different ways, but not once have i been able to flatten the part.

I have a deadline on a project, and am half tempted to go out in the shop and lay this project out by hand! Anyway, if anyone can help that would be great.

as this project has multiple different size bands that need welded and polished and need to be accurate. Attached is an example of what i need.

Thanks