Thanks @jepenny!
I was actually reading over that same link and clearly didn't see the part about RSA.
I found this one on Amazon and I am going to give it a try: PIVKey C910 Certificate Based PKI Smart Card
Here's some documentation linked below. It looks like the main thing to look for is that it has an RSA key.
https://support.lastpass.com/s/document-item?bundleId=lastpass&topicId=LastPass/Smart_Card_Authentication.html