Rubber thingy in the door lock switch

btw OP, they are almost all the same for cars that used them.
yes dodge/plymouth had thier very own "design" & If I recall, early mopar versions were smaller in dia. but in the current aftermarket metal w/ felt inner lining selection w/ bendy tabs, it may surprise you but they are all the same thing just marketed for different cars.
all mopars (A/B/C/F-body approx 1969-79) use pretty much the same ones.
Even chevy units will work...
& there are several "universal" ones as well. shouldnt cost more than a few $$.

https://www.amazon.com/dp/B00H87VMBY/?tag=joeychgo-20

600 Door Lock Ferrule for 1968 - 1972 Chevrolet, etc.

Door Lock Ferrules 72-76 A Body & 71-74 B Body Stainless Steel