Brendan, I have some duplicate 1914-1924 Zeenuts available on my website:
http://www.starsofthediamond.com/caramel.html
I also have a bunch of 1922 Zeenut duplicates available here:
http://net54baseball.com/showthread....t=1922+zeenuts
Let me know if you see anything that interests you
-Rhett