Wasn't sure where to place this, but I encountered this article while searching for something else. Could be a source of leads for scrap, etc. I know that when Big Lots closed a store in Mesa a couple of years ago, they were dumping huge amounts of good stuff into huge dumpsters out back. I asked the people working in the store for permission to take some of it.

2014 US Retail Downsizing & Store Closings Roundup - Alphabetical List