Ask Derby about this item.
We have a few Campagnolo hubs, they are just lying around, and we can use them to build your wheel. Or, send us your used and useable, or new hubs and we will use them. If you want them overhauled and properly adjusted, we can use original Campagnolo bearings (grade 1000, good)or Edco Swiss balls (grade 25 best). If they are for track use we can remove the grease from the hubs and replace it with a special synthetic lubricant. After this treatment, the axle will spin for a second or four when given a spin with thumb and forefinger. The Campy hub dustcaps have a hole to be used for the very infrequent lubing (we left our first test hub alone for a year).
After all, your hubs typically steal 1-1.5% of your energy output. While we're at it, if you wish, we can remove the dust caps too. Some people think it looks cool and it will be another one of those lil badges of membership in the Trackie Tribe.
Shown in the photo is a pair of used small flange record hubs
with 36 holes. The front hub has no dust caps.