I made one for our GR Meetup here: https://badges.page/b/naddr1qqt5wunpdejzq5npwp5kgueqgf5hgcm0d9hx2unnqgsdmpqwgvae0pu4hv66gz9uv8hhaxtg3wstzehcedx8e67t2vvwevqrqsqqqafenefmsh
They are simple to make and issue, I would love to see more meetups have them!