Think I'd be pressing the old studs out of the old hubs and re-using them, Any good shop with an hydraulic arbor press can press them out (if the will fit) that is.Glad you got them off they can be tough.
Notice on the hubs you pick that they do not include the studs or nuts.
You might have a hard time finding studs that will fit and hold in those hubs.
Sure look like splined press in studs to me.