Here's a pic of a friends grips that he uses for Bianchi cup shooting. He wanted an extension to make the prone portions easier and more accurate. As he says "These are working grips, not for show." so he didn't much care about the two tone between new and old wood. The new could have been stained to match (I shudder at the thought of staining wood ), but in this case, he just doesn't care. I didn't know there was a need for this type of thing until he told me.