I've only lifted the shifter boot once - because you can!!!
I can't remember, are there adjustable stops on the throw of the lever?
If there are you could try adjusting those to save the trim ring - don't adjust them too much or your car will jump out of gear, or not engage at all.
If there are no adjustable stops then I have no ideas off the top of my head (apart from fabricating something) without looking at it in detail.