Looking for 1984 specific GN leather/cloth seat covers. I would also consider a set of good-to-excellent condition complete front seats for this specific application
If you can’t find the right seat covers try looking at G body parts they do offer leather seat covers for the GN they won’t be totally correct but they will be leather.
They just don't have the best reputation. Personally, I would call Highway Stars and / or Legendary and see what they can do.