^No, the station's current core was originally Empok Nor's core. Terok Nor's reactor core was jettisoned in Avatar, and in SCE: Cold Fusion and Abyss, they brought Empok Nor to the Bajoran system so that they could do a core transplant. So if the replacement reactor core is now gone, they're fresh outta cores. Unless there are some other abandoned Nor-class stations lying around somewhere.
I understand that but most of the station is intact wouldn't it be easier to build just a core than an entire station from scratch?