Besides the 356 Porsche, the distributor rotor is the same as the 170V also. Bosch no longer makes the ZVT 53 Z 6 Z (1 234 332 022) rotor but Beru does. The Beru number is NVL010. This is most likely what you will get if you order from the classic center, Niemoeller, or Automobilia Versand.
If you have trouble ... let me know. I have a couple of extras. Or you can temporarily borrow the rotor from your 170V cab A
For your information ... here is a picture of the original Bosch ZVT 53 Z 6 Z rotor.
