Here is the cheapest prices I found for module and ignition coil connectors

Module connectors
Ford Clips And Fasteners
They offer the coil connector too, but it is a ten pack

Coil horseshoe connector
Automotive Electrical Connector Pigtails, Terminals, Tools and More

With shipping costs it might be cheaper to buy everything from the second link or get the module connectors from Ford Clips And Fasteners and then get the horseshoe from Napa