I have a Colt Lawman, The trooper grips should work with just a little bit of finishing done to them.
I have a set of pachmayr grips if you're interested.
I got a set of Walnut Grips on mine so I wont be going back to the rubber pachmayr ones.
Feel free to send me a message if you like. I can tell you (via picture) where you need to sand the grips down just a hair to get them to slip on to the lawman.
"The beauty of the second amendment is that it will not be needed until they try to take it."