On the first photo you see countries i miss thanks to that list i can easy navigate to check what i miss.
I would like to have the same list for issuers. Right now there are options
from which I have coins - shows countries from which i have coins
from which I don't have any coins - shows countries i still missing.
all - show all countries from i have or dont have coins also show the list of issuers that i dont have.
Is it possible to add a line showing Issuers from which i dont have any coins.

PS
CREPOSUC
I dont use excel so this is not good for me.
Former numista referee for Poland and half of african countries.
I invite you to my FB group about commemorative coins :
https://www.facebook.com/groups/1635288620035921