I have a set on my GP100. Reasonable in price, quaility workmanship, and I would say a large selection. Here is the link, http://www.rugerforum.com/phpBB/viewtopic.php?t=9014. He is a member of the Ruger forums
Here is the link to the Ruger Forum, http://www.rugerforum.com/phpBB/
I am going to bead blast the frame,barrel, and cylinder to obtain a satin finish and polish to a mirror finish the hammer, trigger and flutes on the cylinder. Had to get rid of the warning and Ruger GP100 off the barrel.