One paper prop from this game I like and which hasn't been mentioned here yet is the proclamation poster of the reward for Henry Avery's capture that Avery has framed in his office. It's easy to miss but quite a nice story touch in there when you arrive to his mansion. Nate even makes a comment about it.
While looking for replica options I found
this site, which sells what they claim to be a replica of the actual proclamation notice from 1696, which is close to the design in the game but not the quite the same:
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Here is an attempt to straighten that up:
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I took those screenshots on a PS4 Pro on 4K yet the resolution still ended up being not good enough to make out the small characters. Maybe should've been closer to the wall. Maybe the texture itself is not that sharp to begin with. Anyone has tried to get hold of this one?