End of story:
First, thank you Elk Hunter 338 for your offer to professionally mill the rail and refinish the metal work properly.
Ultimately, I decided to give it a go myself. I taped off everything with multiple layers of masking tape. Then I tried to reduce the lug height with a Dremel tool and stone. That was a no-go. The stone barely did anything. With a bit of trepidation, I reached into the toolbox and grabbed a flat file. I ran the file along the lug at an angle that was similar to the angle of the scope bell. It was a long and slow process to remove the metal and to keep the angle consistent from side to side.
I eventually got the lug reduced in height and the angle to where it closely matched the scope. I was careful to not go any farther than needed. I touched up the angled portion of the lug with a little black paint. All in all, I think it came out pretty well.
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