I used to maintain the Normandy hubs on my first Raleigh, over 50 years ago. I found that the standard Campagnolo (Record and Tipo) axle sets (axle, cones, and locknuts) worked well. Actually, they worked better. Of course, those are long gone.Nowadays I would measure what came out of the hub and match and eyeball it to the components in the Wheels Manufacturing catalog, axle parts.
https://wheelsmfg.com/search?options...ide&q=hub+axle
Happy hunting.