This is a difficult one, I would suggest taking it to a phone repair shop.
https://www.youtube.com/watch?v=ycER7MH61l8 - the link is a video on taking apart the phone itself if you wanted to attempt to repair this yourself.
I am not sure where you could buy a charger port, hence why i suggest a phone repair shop as they would have the equipment and hardware needed to repair this.
Sorry i couldn't be much help, but if this has helped you in any way please accept the answer or score the post.
Wish you all the best