Ah, so thats what I was wonder about when I looked at scarebirds rotors, there are no hubs in them. So I would just re-use mine, which is fine by me except my drums are a miss match. One drum has the separate hub, when the other drum has the hub fixed to it. I looked on Rockauto and other part stores but don't see where I could purchase another hub, but have to believe they are out there. Maybe scarebird has some as well..
Thanks all for the replies! Maybe there is hope after all.