I recently learned that you can just give a printing company a hundred bucks or so and have custom NFC cards printed for you, you don't actually have to be a big transit agency with an ongoing contract for millions of the things and a custom JavaCard NFC application or w/e coded for you.
I used this knowledge to replace the QR code membership card to my friend's bar with an NFC card version, it looks really cool in your wallet compared to all the flimsy paper stamp cards from the other bars.
You can even get blank cards, I have a few from university days. And you can get card printer... Can't find exact price now, but not extremely priced. In theory you could just do whole thing in single location from coding the card to printing it, even with custom information.
I used this knowledge to replace the QR code membership card to my friend's bar with an NFC card version, it looks really cool in your wallet compared to all the flimsy paper stamp cards from the other bars.