Boss weapons/armor glamour items

I just had the thought after thinking again that more boss weapons and armor should be added as glamour about where exactly to put them for acquisition, and they can be added for sale to Jonathas in Gridania for the achievement certificates. It makes perfect sense, as they would just appear for sale after beating said bosses in the story. That way, they are also kept mostly spoiler free unless you see someone wearing it and look it up ahead of time to find out where they got it.