What kind of ceiling tile is this? Possible to repair?

(Sorry if this is the wrong forum, but I wasn't sure where to post this.) I've got some sort of interlocking paper/cardboard tile that makes up my kitchen ceiling. There was a leak from the bathroom upstairs that hit the tile and soaked some of it away. I've repaired the leak, but now my kitchen ceiling looks like this: Attachment 50537 (http://www.doityourself.com/forum/attachments/walls-ceilings/50537-what-kind-ceiling-tile-possible-repair-ceiling_tile_hole.jpg) We've scoured the house looking for any replacement tiles the previous homeowner may have left behind, but couldn't find any. So, some questions: * What is this kind of paper/foam tile called? * Is it still being made? * What is the best way to repair or patch this so it's not such an eyesore?