Hi all, I have a short presentation from 2004 about Boeing's MA-31 target drone program. These were Kh-31 missile bodies bought from Russia and modified to replace the Navy's MQM-8 Vandal supersonic targets. Attached below is the PDF file.
Well, they got them from Russia with nothing but the airframe and motors, essentially. So they had to develop the autopilots, beacons, and all the other stuff to make a missile into a target. Plus interface it with US aircraft systems (QF-4s specifically). And it turned out the motors were not wonderful -- two failures out of 13 shots (plus one due to the Boeing-supplied autopilot).
In the end, they only got 18 total of the 34 ordered, and 13 of these were expended by 2003.