Invisible Item Frames 2
A few months ago Ioka's invisible item frame proposal was passed; however, it could not be carried out due to technical limitations.
So I'm reintroducing another proposal that captures the original goals of the post, while also being possible on the tech side.
A custom villager will be placed in the Arcos head room that offers invisible item frames in exchange for one glass block and eight sticks.
And if all else fails, we could always do the same thing as was done with the custom heads: command block that spawns them in.