Did I miss it when I was looking for them 6 months ago? It looks like the CAD files for the Tinkerkit braccio arm are released:
https://content.arduino.cc/assets/braccio%20cad.zip
I guess they are under a CC-by-sa license, like the schematics linked next to it, but that would be nice if someone had a confirmation about it. Anyone here knows about it?