After the book came out, eBay was flooded with reproductions but you can still find the genuine article from time to time.
A few descriptive notes regarding some of the emblems that are out there:
Northrop's Project NINJA (Netcentric Intelligence, Jamming and Attack) used a miniature air-launched decoy (MALD) airframe equipped with the Netted Element Weapon Service (NEWS) and Netted Effects (NetFx) software. NINJA was designed to be a launch-and-leave weapon capable of operating within a net-centric environment. It apparently underwent developmental testing prior to 2008. There was a full-up field demonstration scheduled for July 2008, but I don't know if that took place. The field demo was supposed to show how multiple users could simultaneously benefit from the NINJA's sensor capabilities. According to the concept of operations, requests from users would come from an experimental Joint Air Operations Center (JAOC-X). These requests and the responses generated would be directly exchanged between the NINJA weapon and the JAOC-X or posted to an intelligence, surveillance, and reconnaissance (ISR) network by an airborne Distributed Common Ground System Integrated Backbone (DIB). Data posted to the ISR network would be available to all authorized users. Scenario parameters would allow users varying amounts of ad hoc NINJA re-tasking capability in near-real time to response to changing battlespace conditions.
Night Stalker II was was mentioned in the May 11, 1984 issue of Northrop News: "The first Cobra helicopter supplied by the U.S. Army to the Electro-Mechanical Division (EMD) for the Pilot Night Vision System (PNVS) Surrogate Trainer (Night Stalker Il) program was accepted for the division by Fred Doten and Geno Vagnone, division helicopter pilots, in a ceremony at the Associated Air Center modification facilities, Dallas, Texas. The Night Stalker II program will modify the Cobra helicopter for use as a trainer for the more advanced Hughes AH-64A Apache helicopter. Use of the smaller and more readily available Cobra as an Apache trainer will be less costly to the government and will eliminate the need to remove the Apache from operational use. The PNVS built by Martin Marietta, will permit the trainer to be operated at night, under Nap-of-the-Earth conditions, without external light."