Originally posted by Tanzer you can drill your own hole in the mount, so the lens will lock in the intermediate position. You would want to remove the lens mount before drilling it of course.
I signed the petition and would also hope you do too, although nobody really knows if Pentax will listen.
I went this route. I had an M50 1.4 with a bent filter ring so I wasn't worried about resale value. I just drilled another notch on the back of the lens. It now locks and I can stop it down while continually metering.