Here is a set of Grips I made for my Richards Transition. They are made out of Corian and Chuckaroo's did the crosshatching for me. While not true checkering, they do give me a little bit better grip. I'm going to make grips like this for both of my .45 SAA Colt clones. I've found a new shade of Corian that does a nice job of resembling Ivory.
That looks like the Tom Selleck grips that SHB pictured above on 26Feb12.
I think I'll try that. I have a couple of sets of checkered Gunfighters fitted for Rugers. They are a bit too sharp, but the Selleck grips look like they'd work real well.