If only broken hinge or hinges. Should be able to purchase similar small hinges at any hardware store or hobby shop along with small screws. simply split the covering with a razor blade or hobby knife and remove the old hinge. install a new hinge, apply some contact cement to both the covering and the hinge area (making sure not to get the cement on the hinge pin) and press the covering back in place. The covering will usually stretch enough to make an almost invisible repair. I have on occasion used doubled sided carpet tape to stick the covering down in place instead of the contact cement. Re screws: might have to cut them to length so they do not protrude through case into the inside. Hope this will be of some help. If hinges are exposed, simply remove old hing and replace with new hinge. Might be necessary to plug holes from old hinge with some tooth picks and glue.