Unhelpful for this situation, but NearlyFreeSpeech.Net is a pretty great host and their general policy is to tell people to pound sand for any requests.
Specifically in the face of a subpoena from a US court, they are bound by law to comply. There’s really no way around this. If a company wishes to remain in operation, they cannot flout the laws of the jurisdiction they operate within. That said, their policy is firm that they require legally binding instructions before acting and that they will alert you unless bound by law not to. This is a stronger guarantee than most hosts.
From their privacy policy:
> Unless legally prohibited, we will inform you of any cooperation we provide to any law enforcement authorities.