That be the one!
All that stuff would be nice if they would do that. But if the sold just the grip, it would reduce sales of the whole gun.
If the profit amount was the same on a grip frame and a whole gun it would be good business to sell just the grip frame. I have a feeling that profit isn't the only reason Ruger doesn't do it. They could make a killing selling 10/22 actions with or without bolts or triggers.