You pretty much said you wanted to replace it with the later style header panel. I took it you meant the quad headlight panel.Oh yes I meant to say replace the header panel with 82 and up.
Good luck finding one, it shouldn't be too difficult.
I don't know what your local junkyards look like as far as older cars are concerned, but you can try checking out car-part.com. It might help narrow down the search. https://www.car-part.com/ or post an ad in the wanted section. I'm sure a fellow member could hook you up.