I currently have 2 top grilles for a 1984 GP, one that is on my car, and one i have to replace the original one which has a slight crack in the middle, not noticeable but i found one to replace it. If you want to wait until i replace the original one, i will sell you it for cheap $$ It may be a few weeks until i get my car out of storage though. I agree with you about the 84 and 85 grilles, i like the 84 a lot better.
There may be a lot of GP's down in Florida but up here in new england they are all but gone! The last time i went to the junkyard you could count them on 1 hand if you were lucky.