When it comes to OE that is a complicated issue. There are OE parts that came on the car factory and thee are OE sold at dealerships which are not necessarily the same thing. Obviously, this doesn't pertain to us because AMC no longer exists.
There are several manufactures that manufacture for the OE suppliers and also supply the aftermarket parts stores (O'Reilly, NAPA, Advance etc.) If you go to a good parts store and buy their premium ignition parts line you are in good shape.
In my experience BWD and Standard Ignition are good brands and they both do OE work.
Wells used to be good but I have heard the quality has fallen down over the years. They do a lot of "cheaper line" house brand ignition for several suppliers.
Just my $.02 hope it helps.