Just buy the cheapest integrated headset with compatible bearings. I believe it's the campag standard, could be wrong though, check before purchase.
i just bough the full caad10 headset as the integrated topcap hex was starting to become rounded anyways and that was £20 on its own.
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Just buy the cheapest integrated headset with compatible bearings. I believe it's the campag standard, could be wrong though, check before purchase.