Librarian's name tag trade should change with craftable name tags

Unlocking the master level for librarian villages always gives one trade, one name tags for 20 emeralds. Before name tags were craftable, they were much more valuable, justifing the high emerald price, but since they will be so much easier to get after the recipe is added, the price should either be significantly reduced or the trade changed all together. I don't have many suggestions as to what a alternate trade could be, (perhaps chisled bookshelves? Though thats not very approprate for a master level trade...) but I think a change is necessary.