Therefore, I talked with Andrew Berryhill of Precision Target Pistol Grips to see what he could do for me. Well, he came through in spades! My new grip arrived today, and it is awesome. It fits the gun perfectly, it's noticeably lighter than the metal one that came with the gun, and he somehow did some magic to reduce the length of pull, enabling me to get better trigger finger placement on the trigger.
If you are having grip issues, I recommend Andrew's work without reservation.