You can get them right here [ top of page]
Make sure you just get the ones under the coils [ 3 of them]
I am surprised no one changed them when they did the plugs and wires..that is standard procedure on a 104 with DIS ignition.
Might waht to look if they have the correct plugs while you are there ..you do not want Plats in a 104 , for sure.

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A Dalton