It's gonna a be this https://github.com/rust-nostr/nostr unfortunately. I've begun builds with one of those you linked, had to restart from scratch. More info here https://pypi.org/project/nostr-sdk/

I'm considering just doing shell calls to nak https://github.com/fiatjaf/nak and using it as a system library for my programs. Not sure if that's the best idea, but that's the reference implementation of nostr and is certain to contain everything I would need.