Most any Ruger grip will "fit" most any Ruger, HOWEVER there are slight differences. Some might require some light file work, some fitting might require "major" file work. Some fitting may require welding.
You just have to get the grip frame you want and give it a try......
Usually the biggest disappointment is the "height" of the ears (the left and right portions of the grip frame that "surround" both sides of the hammer and have screws on both sides) vs. the height of the rear of the grip frame.
Grip frame taller than the Cylinder frame? Get out your files and Dremel.
Cylinder frame taller than the grip frame's "ears"? Rats......
flatgate