I believe you are mis-reading Benzmacs post.
The common problem on 104 waste spark ignition system is not
bad coils, but the coil ends that connect the coil to the plug. There are these style end on the 3 plugs the coils sit over.
They are 8-10$$ each.
The other 3 have not been troublesome as they don't have the congested coil heat to contend with.
You will see them when you lift a coil. If you have spark related mis-fire codes, Try new ones before condemning your 3 coils.
As also said, change the plugs at the same time you are in there....
[ with copper, of course]