Answered: Clarification on R7L: 3D printed connection holders

Under this rule would a 3D printed cable clip such as the following be usable?
http://abex-abex.rhcloud.com/static/clip.PNG
This sits between wires on a cable connecter and holds it together, similar to how a zip-tie would.

No, these would not be legal. Please take a look at this previously answered Q&A for full details.

https://vexforum.com/t/answered-usage-of-3d-printed-wire-management-college/26945/1

If these are commercially available would this be legal?

This is correct.