3D print models for robot arm missing

Firstly I'm a bit disappointed that the zero to hero kit didn't mention needing a 3D printer. My daughter was upset when the instructions simply said, collect the parts you 3D printed, with no mention of that before. Luckily, I have one at work, but where are the stl files? None of the links in the e-book work and there's no links at all on the website.