If you get a prop made by one of the specialist companies they will make it with whatever ends you need, fully balanced and with a power rating
Mine arrived from dunning and fairbank last week who did a great job with fast delivery
Its been talked about before if its best to buy a prop from a specialist or make one of your own, after looking at both sides of the argument i personally think a proffesionally made prop is the way to go
When you think there is only a thin piece of aluminium between the prop and you so its the last thing you want to let go