I have a quick release for a 6 bolt steering wheel for sale. Unknown brand, was in the car when I bought it.
The black part bolts to your adapter hub.
The silver part bolts to your steering wheel.
Works great, $50 picked up in Chilliwack. Will do trade+cash from me for a 6 bolt wheel, as the one I'm using is crap.
Edit: note that the black screws in the silver piece are the screws meant to hold the black piece to the hub. I just needed somewhere to put them.