You got me thinking about try and 3d print one in flexible material lolI got one on my Prophet , I call it the Orion grip, As he suggested it on the RTI site.
Its comfortable in the hand and has a lip at the bottom when your carrying your gun so it doesn't feel like the gun is going to slip out of your hands. I just ordered a second one for my Prophet II that will be here last of September . The Orion grip sounds cool.
LOL
Mike