1970 Duster Headlight Switch Knob

Looking information about where I may locate or if someone has one to sell for a functional and useable condition headlight knob for my car, 1970 Plymouth Duster low option interior:

Headlight Switch Assembly [Knob]
Shipping to Oak Harbor WA, 98277
Price: No more than $25.00

I am open to suggestions for a decent looking, suitable (functional) replacement idea(s) as well. This car is NOT a trailer queen, but is a 318 car that does go fast, looks nice, and sounds great doing it.