Looking for a Concorde tag

Hello!

I’ve been trying to get my hands on a Concorde tag (they seem really hard to find lol) for my boyfriend’s birthday. He’s an aerospace engineer and it’s his favorite plane! I saw that airliner tags dropped some a few days ago but they instantly sold out. Does anyone have any tips or insight into snagging one of these from any seller that makes them? Is it a Ticketmaster vibe where you need to be on it immediately and prepare for battle? How often do they restock?

Thank you in advance!