Tree stumps/slices (Romford RM3)

Hi, I am looking for tree stumps/slices for the school I work at , we want to make a circle with them to sit on out in the grassy area of the playground, like the ones you see at the forest. I only have a small car so I can't fit too many in but if you are cutting down a tree near Romford, please think of me! Thank you.