I could 3D print those, and they would look substantially better than those samples. I believe those were printed on an FDM printer. I have access to a state of the art polyjet 3D printer. However, the parts I print, with the materials I currently have, the parts would be more brittle than the FDM parts. In the end, I think the FDM parts (if that's what they are) are mechanically superior to what I would print.