Contact Buddy Sams about a Special Missions Gulfstream. Gulfstream has aircraft in international service for Maritime Patrol, ELINT, and Surveillance.
The Army's Aerial Common Sensor has specific speed requirements for it's sensors and Gulfstream meets it's Required Operational Requirements (ROC).
Among Special Mission Gulfstream operators, the Danes, Swedes, Indians and Israelis as well as domestic organizations have found Gulfstreams to meet their mission requirements, I bet you can, too.
GV