I have seen them around but I myself have never used them. I think IDEAL has a wire twister built right into the handle of a screwdriver. Also I have seen the ones that go into an electric scredriver.
I've got that same model and it works great! It even works on red wingnuts. The little blue thing that comes with the wirenuts isn't worth crap. The supply house sold me a yellow plastic one shaped like a cone that I like a little better, but it only works on tan twisters.