I purchased some BGE Birthday cards.....

northGAcock

.....off of Etsy (yes I have an account) and they arrived today. They were not inexpensive, but purchased a small quantity to have on hand. I inquired of the seller if there were any discounts based on a bulk buy....and got this message in return:  I would be happy to extend wholesale pricing to you all depending on how many cards we are talking about. It would be the same pricing given to shops that stock our cards. Generally speaking I can offer that when there are 75+ cards ordered. 

At any rate, regardless, here is the link to view and order them yourself if interested.

https://www.etsy.com/search?q=Big%20Green%20Egg%20birthday%20cards