Hey,
Yours is repairable, hopefully it has not been thrown out. The soft metal spring retainer pivot pin has served for 50 years and couldn't continue. RIP.
In the Porsche world this is a common failure point, and replacement pivot pins are readily available. Instead of being peened over for retension in the regulator , the replacement has a bolt to secure it. The clocking of springs on 911s' came parallel and offset(pic shows both ways), and the length of the pivot pin changed too. There are companies that make the pivot pin with both grooves cut in the pin but if you have the old pivot pin remains, you'll see the orientation and length needed. I've repaired many 911 regulators as well as 2002 and E9 using replacement pivot pins. If you need more help with this, let me know and I can guide you through it.
Best, krauser