unbending elliptical rolled sheet metal

Hello,

trying to unfold this and draw. It was created with an ellipse at a specific height from the bottom tangent and a base flange. i've tried to roll it back without the fillet and assign the edge to an "unfold" command, but it didn't work. Other than redrawing it, any suggestions? The challenge is keeping the elliptical profile as it is obviously not a constant radiuSOLIDWORKSsolidworksdesignersheet metal 

link to file:

https://www.dropbox.com/scl/fi/av6nlnie87fzp16ppmvwu/151.000519.00.SLDPRT?rlkey=y4dxpna0o9rahb7r2p1nm7rc9&st=prwn7688&dl=0