I think it is a very good idea! But first it needs to be determined if it is just us being enthusiastic or if it is a project worth putting time and effort in.
It takes me an hour to print one. Prototypes are ok. But 100 pieces ... Then we need to think about 3D manufacturing services.
Who would/could distribute them and where?
It would require involvement from the people managing the faucet.
It would require funds and organization.

Those are the first things jumping to my mind. But I certainly like the idea. It just needs more community involvement.