You might want to look at a few of the styles made by Herrett's (Herretts-stocks.com).
They make the Roper style, a favorite of Skeeter Skelton, and the Jordan Trooper style (similar in design, but slightly larger w/covered backstrap). Both of them knew a thing or two about handguns - and were two of my all time favorite gun writers.
From watching Jerry Miculek on TV it appears he uses grips similar to the two above. He's also had a smidgeon of success using S&W N frames!
