Rob: We have one that is close to what you describe, but I can't recall the brand name right now. It doesn't work completely like a NASCAR jack. With one stroke it will take up the distance from the floor to the frame etc. and then you have to pump it like a regular jack after it starts to lift the vehicle. It does work very well.
If you watch the NASCAR pit stops, the jack man really lunges on that jack to lift the car quickly. I think with normal usage they may not work as well as we may hope.
