There is a good chance that the connector is not listed in Eagle. Off hand, I don't know if it is in their included library or not. If you download the tutoral from the Eagle website, they walk you through making your own custom libraries.
One thing you can do in the mean time is use a 6 pin single row header with standard 0.1" spacing. All you have to do is give yourself room for the rectangular mounting block that the pins are secured to. It is about 15mm long by 6mm wide.