Hi Marissa,
There is a starter library of about 11k parts available from Optimum Design Associates (ODA) - this may have the connector you need:
Optimum Part Libraries for PADS - Mentor Graphics
DEMO PCB Libraries, Mentor Graphics Library, ODA Library
Otherwise, in the VX release you can import EAGLE designs and libraries through File > Import > EAGLE:
Lastly, we are working on a component portal (PartQuest) where you will be able to look up a part number and download the symbol & footprint for it immediately. Right now the portal works with PADS - it will be rolled out to Xpedition later this year: