I love my Carter but you can't buy it anymore, it's called a Hole in the Thing 3. I'd imagine maybe you can find it used. You can activate either the thumb or the pinky. I use it with the pinky and back tension but if I develop a flinch, I change to thumb and then back. But I digress.
I'm not sure which one I'd choose next. They are all so very very close in resemblance and all roughly, costly. [&:]