Hate to ask a dumb question, but why are you replacing the hub casting? if it's a matter of a stripped-out lug the common fix for this is to simply drill the threads out and press/draw in a splined lug to replace it. I have a hub on my 109 that has had 2 lugs done that way and I've had no problems with it.
As previously stated the thread-in lug hubs are no longer available, but a used one could no doubt be sourced. There is very little that can go wrong with a hub to render the casting unfit for service.
The threads for the studs are wrecked. Only one on one side and possible 2 on the other work.
Welcome To LandyZone, the Land Rover Forums!
Here at LandyZone we have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you're in the right place.
Registering is free and easy just click here, we hope to see you on the forums soon!