Normalize Fender Flare Lip Thickness

I have a completed front-fender-flare model for a Ford F-450, but the front lip ended up thicker on one end and thinner on other end. I want that lip to match the thickness used on the thin side throughout the rest of the part so it looks consistant.

You’ll start from my STEP file, adjust the geometry so the lip stays as even as reasonably possible all the way around, and return an updated STEP (and, if convenient, a quick STL for visual confirmation). All other styling and mounting details should remain untouched; only the lip thickness needs attention.

I’m fine with whichever solid-modelling package you prefer—SolidWorks, Inventor, Fusion 360, NX, etc.—as long as the final export comes back in clean STEP format with no broken surfaces.