styrofoam tombstones (Brooklyn)

Does anybody have styrofoam tombstone you don't need I am trying to make a project but the thing is I had a really good this so my fiance take a move in so she'll have a lot of room for herself I have a queen size bed that's a blow up mattress and I'm trying to make like a mausoleum but I need old tombstone Halloween anybody has any place from the side I would definitely need it my fiancé lost a little bit by September and I want to finish the project by August