I have no clue except for DFW maybe, it could be contracted out there. You would have to research that yourself.
I do know that the card drive started on Dec 19, 2019 and it's for both the mechanics and maint controllers there.
BTW; 80% of the cards you "say" have been collected will be null and void since most all of them will no longer be employees come by the end of this year. Most all of them were just trying to make the TWU feel good by signing cards as they new they will be gone after taking the VSP early out retirement packages.
And by the average of what ya say you are collecting it will take you 10+ years to get the approved allotted number of cards and by then even more and more cards will void after more retirements within the 10 years.