Because it was a accessories back in the day, it would be nice to have one.
Found one on E-bay, and thought way not

Its a new one (aftermarket) but close to original

Sadly when mounted it does not line up right, its to steep

I needed to correct it

By milling the end stop a little bid further

Also the stop pin it self needed to be corrected otherwise it hits the engine

Now it is in the correct angular

Fully functional, and easy to use