Are there any junk/scrap yards in/around Los Angeles?

Are there any junk yard around La? I’m looking for some junk/scrap/metal yard where I could go and actually buy misc things. Not really looking for a pick-and-pull. I’m looking for a place I could find some old road signs, misc metal pieces and the like. I’m in the process of making some Mad Max-esque shields and things along that aesthetic. I don’t think re-stores and other vintage thrift will have what I need for my price (eg some vintage shops charge $100+ for a road sign). I’m going to destroy them.