Top dressing for plant pots. (Salhouse NR13)

Hi, I am looking to see if anyone has any slate, shingle, pebbles, gravel, stone chippings and other decorative aggregates that they no longer want. They are to be used as a top dressing/mulch on my small to large plant pots (to reduce the loss of water from evaporation and to prevent /suppress weeds). Thanks for looking.