Hi. Excellent forum. I am looking for the original black plastic vent lever that has the thumb imprint that fits into the side chrome vent levers on the driver/passenger side for our 230SL manufactured in May 1964. I tried Authentic Classics, Neimoöller Benz, and the MB Classic Center. The schematics show the original lever and I was sent the one currently offered with the flat end to grab. Thank you.