Door Striker post?
What you have is factory. I repaired both of mine when I had the quarter panels apart. I drilled out the spot welds that hold the capture plate on. Cut a larger patch panel out of the old quarter which I welded on the inside and then welded the cracked metal back. Used the original hole as a guide to drill out the post hole in the patch and spot welded the capture plate back in.
What you have is factory. I repaired both of mine when I had the quarter panels apart. I drilled out the spot welds that hold the capture plate on. Cut a larger patch panel out of the old quarter which I welded on the inside and then welded the cracked metal back. Used the original hole as a guide to drill out the post hole in the patch and spot welded the capture plate back in.