My wheels and hubs were supplied by my kit supplier
Realm engineering i dont know where they got them from sorry
You could try contacting them (
www.realmengineering.com)
My hubs are not using stud to splined adaptors
My front and rear suspension is from my donor xj6
To Which i fitted splined hubs completely removing the stud type hubs
The hubs must have been made to fit the jag stub axles /drive shafts
Hope this helps