Juve should stand firm and put the 3rd star!, no one could do anything about it, not Abete, not FIGC, not UEFA, not FIFA.... hell we could put 100 stars for all we care, they have no say over it.
This is the best I've got that someone (sorry, forgot who) shared on the forums. It's the one I made the avatar out of, and I think that same version of the avatar is what everyone is now using.
[EDIT: Dammit for the watermarking! I can post it up somewhere else if you like.]