White Ensign Models makes a PE set with options to make any of the Nimitz class. Includes the radar support structure which differed (top row on this fret and the next).
Different radars, lots of goodies. Airwing details also available
White Ensign is out of business, but Toms Modelworks picked up the rights to produce their PE and some of their resin kits.
https://www.whiteensignmodels.com/p/WEM+1350+USS+Nimitz+The+Ultimate+Set+PE+35039/5244/#.VkCQY7erTIU
IIRC you are able to direct order the WEM products from Toms via the WEM website. In doubt, contact Richard Harden of Toms. He can set you up.