I haven't taken apart the strut's yet so I was assuming that the strut hats/caps were a one piece design with some type of a rubber bushing that's vulcanized into it. It sounds like its a two piece design instead.

I was looking at replacing the metal caps because on the one's I have the rubber bushing inside have numerous cracks, If i can just buy the bushings that'd be better.

Thanks for all the help, we'll see what Nissan has to say about availability.