She wrote an excellent tutorial about designing and 3D printing replica parts if you find yourself in a similar situation.

I made some mistakes learning how to use the $300 Elegoo Centauri Carbon 3D printer, but it didn't take me long to make my first part.

This tutorial on how to cast metal parts from 3D printed silicone molds is a perfect example of how useful a 3D printer can be when you are looking to make a custom and durable metal part at home.