I have gotten these to work so far, though a couple are invisible
Cheat Summon CommoditySellerNPC_Freeport_BP_C
Cheat Summon CommoditySellerNPC_MerchantShip_BP_C
Cheat Summon CosmeticSellerNPC_BP_C
Cheat Summon CosmeticSellerNPC_MerchantShip_BP_C
Cheat Summon CrewRecruiterNPC_BP_C
Cheat Summon FerrymanNPC_BP_C
Also these seem to work for the crewmembers
Cheat Summon HumanNPC_BP_Crew_Female_C
Cheat Summon HumanNPC_BP_Crew_Male_C