You'll need to go to the library and tell them you've lost it, so they can put a freeze on your card. Then they'll give you a form to fill out, and its $10 for a replacement. You'll need that Enrolment Advice thing on estudent, so print that out, and then go to Student Central (where the old ERIC was) and give them the stuff and you can either get a new photo or just get the old one on the card.