In Far Harbor Winderness(-7, -11) there are two dead characters named 
Synth Refugee (
DLC03_Loot_CorpseSynthRefugeeFemale, 0x054202,  and DLC03_Loot_CorpseSynthRefugeeMale, 0x054201).  Both are found dead, and neither has a Synth Component in their inventory when looted.  
There are six other characters named 
Synth Refugee in the game (
DLC03AcadiaSynthRefugeeM01, 0x04f10a, DLC03AcadiaSynthRefugeeM03, 0x04f10b, DLC03AcadiaSynthRefugeeM02, 0x04f10c, DLC03AcadiaSynthRefugeeF01, 0x04f10d, DLC03AcadiaSynthRefugeeF02, 0x04f10e, and DLC03AcadiaSynthRefugeeF03, 0x04f10f).  Each resides in Acadia, and each drops LL_SynthDeathItem > SynthDeathItem (Synth Component) on death. 
I submit that the two dead Synth Refugee characters need to have a SynthDeathItem (Synth Component) in their inventory.
Thank you for your consideration.