I don't know of any temporary fixes but in general this is a pretty simple thing to fix. You can buy the fabric at the auto parts store along with the glue. Pop the old ceiling off (usually held in with some pins and or a couple of screws), tear off the old fabric, spray down some glue and lay down the new fabric. Once dried just pop the ceiling piece back in. I did it once to my old car a few years ago and it took about 45-50 min., it took a few just to figure out how to remove and get the thing out trough the door

. Maybe you can fix it for him and just charge him a few extra bucks.