Last DC in child domain died

Hi,

I have an AD forest with numerous child domains. Unfortunately the only DC on one of the child domains just died (hardware, not coming back)

Is there any way of adding a new DC to this child domain (when I try it fails because its looking for the dead DC), would one of the root DCs hold enough child domain info? 

Or is the only way back to create a new DC and a new child domain and migrate all the member servers here, much pain!!

Thanks you.