Honda VT1100. That is what I have on mine with the stock seat modified and that is what I think Chuck used for his with the 900 seat. Basically like this one except with a pad on it of course.
I will say, I have been thinking about how to modify the backrest so that it can be quick release. I have seem some HD backrests like that. And I don't think it would be too hard to do. I just haven't taken the time to do it yet.
If you have turn signal relocators check through the pictures in my sig. With this you need the chrome side rails and cut the upright piece off. If no relocators, the set up still works just relocate the turn signal if they are still stock.