By "the available ones" do you mean the spare switched power plugs intended for the roadbook? Those are Molex .093" connectors. They are the 2-pin version of the connector used for computer disk drives.
In N.America they are available at Radio Shack. You might be able to order them from mouser.com Here is the catalog page: http://www.mouser.com/catalog/632/1265.pdf
You need to order the housing and the pins separately. They are designed for a crimp connection to the wire, but if you don't want to buy the crimp tool they can be soldered.