Scrap metal or plastic bundles (ME13)

Hello community. I'm an art teacher on the scrounge for any scrap metal or plastic smallish mechanical looking parts in bulk (sort of old rubbish you might find clearing out a shed- screws, bolts, bogs, plugs, hinges, broken umbrellas, computer mice etc.) that I could use in my mechanical creature art project. (I've attached some student examples, so you can see the sort of stuff that works). I'm in the Faversham area and could travel to Ashford or Canterbury (where I work) area to pick up. Thanks in advance. Caroline