[Zealii]

After reading about how Solidworks releases a KOP for each season with common parts, I was wondering if there was a similar thing for Inventor. I have looked for a library with no luck. Sometimes there is a certain part on the manufacturers website but more often than not, the part that I am looking for doesn't have a CAD file. Is there a central location where I can download common parts that I would probably use during build season like motors, roborio, or gearboxes?