Hello, I think it's possibly easy to add a small text to a cosmetic description where says which players the cosmetic item passed by.
Since the cosmetics item are not stackable, they are unique. And I see the possibility to explore the unique features.
Just add a data variable when acquired and a date variable when unaquired events and from which player.
That would be curious to know who had these items before.
You could add a minimum time limit to hold to print a name, like a week.