Printing is one thing . . . If you can find the *.stl files you’re in business, however if you want to reproduce a broken visor clip, for example, you may need a scanner.
If a visor clip is broken and can be glued together, you scan it and print a strong replacement. I’ve tried 3D scanning a few things with my iPhone 12 with some success. In a perfect world a dedicated 3D scanner gives the most consistent results.
https://www.thingiverse.com/
When I got my printer, I was up and printing pretty quick. There are many websites out there with *.stl files, Thingverse is one of the better ones.