Amazon: 12 credit card sized, plastic NFC tags for $7,99.
https://www.amazon.com/SKAYIN-NTAG215-Memory-Compatible-Amiibo/dp/B097DKVHT9/ref=mp_s_a_1_4?crid=2TJJ1J457XC0A&keywords=nfc+card&qid=1649602750&sprefix=nfc+card%2Caps%2C457&sr=8-4