WTB: Campag threaded headset

Looking for a Campag threaded 1in British threaded headset with stack height of approximately 26.5mm at the top cup+locknut (some space for fluctuation either side since I question my tape measure and don't own calipers), and 3/16" bearings at the bottom (need to replace my top cup, locknut and bearings but of course looking to buy a whole headset) - eBay turns up a variety of things of questionable suitability so if anyone here has a spare kicking around it would be much appreciated!

26.5 mm is very low stack, IRRC the Tange Passage is the lowest stack threaded headset at 30.3 mm.

Only referring to top cup/locknut, so not including race or bottom cup height..

Ah, bit complicated but fair enough!

I have a tatty C-Record?

Got a v nice Campag Veloce HS? T

Thanks Tom! Am hoping to just swap out parts without swapping the whole HS, so I'm not sure how nicely the Veloce (it's fairly new, yes?) would play with the races from my older Athena HS? Will likely take up Rod's offer but will be in touch otherwise!

I have a complete Campagnolo Athena headset if that's of any use..... ?

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Alternatively, it's not Campagnolo , but a low stack complete Dura Ace HB-7410 head set is also in the parts bin ...

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@allister Thanks very much for the offer and sorry for the late reply, but have thankfully found what I need from Rod!

@allister Hi, is the dura ace headset still knocking around? how much would you let it go for?