Nikon Z mount has the shortest flange back among the current major mirrorless mounts which is 16mm. The flange back of c mount is 17.526mm and that of D mount, 12.29mm. Chances may be that a c to Z mount adapter doesn't need to have the c mount to be recessed.
So,you may want to wait for someone to make a c to Z mount adapter and get a Z50.