Is a motion to quash a subpoena issued to Doe Four a violation of fourth amendment rights?

Doe Four asserts that the subpoenas should be quashed because they violate its fourth amendment rights. Since it is the entity on whom the subpoenas were served, however, the rule established in United States v. Ryan, supra, requires it to decline to comply and be found in contempt before there is a final order over which an appellate court has jurisdiction. United States v. Ryan, 402 U.S. 530, 91 S.Ct. 1580, 29 L.Ed.2d 85 (1971) (except in cases of a subpoena to a third party, denial of a motion to quash is not a final judgment so no appeal is available).