I really like the Pachmayr Gripper Grips. They fit my hand no matter what gun they are on.
I purchased a mint 4" Colt Police Positive Special 38 and am shooting it a lot.
The Colt factory grips leave something to be desired on this gun and Pachmayr doesn't make a gripper grip to fit that gun.
Any suggestions to get close to the style of the Gripper grips?