Door Striker post?
The door striker post itself is readily available new if that's what you're looking for I reused my old posts just because they were in decent shape and I thought they might fit in the assembly better than new ones when the doors were closing. This is a job that if you can possibly budget that someone wants to do right! my strikers were failing on both doors and I had the previously mentioned reinforcement kit installed when I had the body work done on the dart a few months back. I just feel it's something you don't want to revisit in the future if at all possible.