Unfortunately the 66-67 VW beetle switch assy is getting scarce.
This thread has details on the PN and installation.
turn signal replacement
Although just installing the correct blade / socket connectors in the BDR plug is mucho preferred to dyking the wires.
https://www.amazon.com/Kartuul-0-5-1...%2C111&sr=8-30
The Switch itself PN: SWF W0133-1609437. Not avail thru Backdraft, Rockauto etc...
https://www.iconicparts.com/turn-signal-lever.html
https://www.rockauto.com/en/catalog/...ical-connector
Parts Geek shows stock
https://www.rockauto.com/en/catalog/...ical-connector
Also Speedway Motors.
https://www.speedwaymotors.com/Self-...ns,418733.html