For the rings....Call ruger and they'll fix you right up.
As for the grips, if your not good at wood working or have the equipment, you may have to contact a custom builder. We have one here on this site (wapitrod); shoot him a PM; great customer service. Someone like Gary Reeder may be of interest. I've got a custom bisley by him and he has his own grip styles; I like mine.
_________________________
It takes 43 muscles to frown and 17 to smile, but only 3 for proper trigger squeeze.