As I noted before, my grille panel looks like this:
I was dreading trying to fix that, and I was also looking for a GMC dual-headlight grille. A solution for both these problems came in the form of a grille & panel together that
t korinek was selling.

For $235 shipped form AZ I got a rust free & fairly straight assembly that is cheaper than a new grille panel alone. It will need some cleanup & dings fixed, but it is miles better than what I had.

The only real issues are the missing outer buckets, a dent above the right headlamps, and a
bullet hole next to the right outer headlamp. Honestly the bullet hole may stay, as it is pretty cool looking.
I'm not sure yet what will replace the GMC letters(PS if anyone needs them let me know). I have seen some people use a Buick grille piece there, but I would really love to fine a set of Chevrolet letters that are the right size so it looks kind of stock.
EDIT:
I forgot to mention, I asked if he could send me the mounting hardware, and offered to kick in some extra $$. He said he didn't have the original bolts but would throw in some spares for free. What showed up was 30+ original style bolts already stripped of rust & paint. He's a really nice guy.