you want to buyone?? or you want to see one installed??? I have one in my car, works fine but it's not for sale, I think they might be hard to find, most just install an aftermarket shifter.
The only slap sticks I remember seeing are the ones in a B and E-body. The '70 E-body is the only one I've seen with a round shaft with a ball knob. The '71-up were all T-handle types. Do you know another application that has the round stick and knob?