Looking for Flats – Long Island

Hey all, I'm looking for some flats for a community summer theatre program on Long Island. Very low budget, so really looking to see if anyone has any flats they're just planning on throwing away at the end of a production or willing to sell for very cheap, as we have little budget. Ideally looking for 4-6 4'x8' flats that have jacks/are free-standing, but more than open to working with what I can find. We're about an hour out on Long Island and would probably be looking to pick them up sometime next week. Would love to give these kids a nice set if possible so all help/leads would be much appreciated. Thanks in advance! Matt