There's a list of registrars that sell them: https://www.registry.google/register-a-domain/

I suppose registering domains with all the possible verbs in present continuous is something that may happen soon and the fuel for .ing runs out

I wonder what nostr:npub15dqlghlewk84wz3pkqqvzl2w2w36f97g89ljds8x6c094nlu02vqjllm5m thinks about .ing