How many different kinds are there?
I have atleast 3 but I don't think any extra

My 79 rabbit has a little brown handle to the left/on the steering column.
82 jetta had a lever that sat flush with dash kind of like my 85 jetta
82 truck has another kind of knob that seems part of the cable that fits in the middle of the dash to the left of the radio.
Just looking at some bits and pieces it would seem you can't swap out the guts across the board because of the way they are anchored?