Performance products has it. It allows you to use the newer benz shift knobs on your 124, 201, 202, or 129 car that has the shaft attached to the knob.
I also bought a momo Combat Metal shift knob which is really intended for a porsche, but with some slight modification of the shaft, it will fit fine. Its aluminum and black, to match the aluminum trim I am placing over the wood in the car.
I am excited. its a great looking knob.
The shaft will have to be shortened about an inch, and I have to get some longer allen screws for the knob to secure to the shaft, but ohh man its gonna look great.
Alon