I have plain old Shimano levers (no shifters in them).
I actually did try to use home made shims to shorten my reach- i used the felt furniture feet pads with the sticky stuff on one side. Unfortunately I found that when temps hit over 90 degrees F the sticky stuff kind of melted and the pads would move around and one got lost inside the hood and I had a heck of a time trying to fish it out with tweezers! I tried a couple more variations on that, including a different material, but the method just didn't work well for me.
My hands are actually stretching a little over time to accommodate the stretch, believe it or not. It's slowly getting better. As a musician I am familiar with this phenomenon- my left hand is currently stretching to adapt to my recently taking up mandolin again- some of those 4 finger chords are bears!