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.