None, but some Volkswagen owners replace their circular VW logo with an aftermarket circular dragon logo.
Opel
There are many. I dont think there is just a circle emblem but there are more than one circles (audi) then the is the circle with the triangle (Mercedes Benz), then there is a circle with an L (Lexus). T (Toyota). You have to be a bit more specific.
If I recall, that year, the SS emblem on the rear of that car, comes via a black rubber insert, on the pass side of the car, which bolts to the bumper.
That would be Dodge, and the emblem is a Ram (goat).
It could be an old Buick emblem.
Ford
Toyota
It is not illegal to put a different emblem on your car as long as it does not misrepresent the make or model of the vehicle.
The logo that matches this description is the logo of Converse, the shoe and clothing brand. It features a black star inside a black circle as part of its iconic design.
It is the emblem of a Ford Torino.
A Maserati
maserati