I saw that switch on ebay but seems a bit pricy. Hope to find a working used for a lot less. From what I can see is the switch was 65-66 Valiant and 65 Dart only. Later switches are the same except for the mounting bracket is completely different.
So they electrical workings/guts from a different switch body might be easily transferred. My focus would be on the bend tangs capturing the board. Hopefully that was consistent/unchanged. Good luck with it.