I bought a Weatherpak kit off of Ebay. Pretty simple and had enough connectors of each type to do the headlights, marker lights, and tail lights with a few extra. Comes with all the seals, male and female ends, and some plugs in case you don't use all the holes in the connector.
DOES NOT come with muscle cream to ease the cramped hand from trying to crimp the connector to the wire by hand without the $100 "weatherpak" tool...