It's the dark argent you need. Actually I think it was officially "dark/medium" as opposed to the light argent. It's not actually too dark!

Here is a pic of my car with its original grill. I bought the Totally Auto Dark Argent, have not used it yet but it had decent feedback as being very close to original. 'Exact' originality has been endlessly debated and considered almost unattainable unless you farm out to someone with the last remaining original tints etc, eg Alltrim. But for mere mortals, TA is good!