Is there any other 14" regular wheel that will fit that I could use?

I'd rather not use racing wheels or mags, etc or go bigger.

Just a plan 14" wheel that I can use my 280z hub caps on.

I bought a used set from a '78 that were worse than mine so I'm looking for a new set of wheels this time.

New will be tough to find, other than from your Nissan dealer. While there are plenty of newer cars that have the same bolt pattern in 14", they are all FWD and won't fit a Z.

Realistically, you are going to be limited to wheels from '72 or newer Z (all 14x5), a non-turbo ZX (14x5.5), or perhaps a RWD Maxima/810. Not much else newer that will both fit the car and your hubcaps.