1975 Dart Fan Speed Switch

I need a blower motor fan switch for a 1975 Dodge Dart. Looking for a good used one. New old stock is too expensive. The cheapest I could find was $40.

The part number is 3502685

It has to be this exact part or else it will not fit in the mode selector bezel.
Careful when you unplug it, the backing tends to fall apart.

Thank you!