Offset Taper Layout

Hi All,

I'm trying to create a parametric layout for a sheet metal oval taper. the issue is, the taper can be offset in both the X and Y directions, I can create the layout for the taper if there is an offset in the X but not when there are both offsets. Has anyone done this before? Or have a sketch they could show so i could see how to approach it? (I have tried in both Solidworks and Inventor, it works but they are too slow at creating the parts, would be much quicker if i could draw it manually)

Cheers!!!