Stepping stones + garden donations (BS4 3AR)

Hello ! We are a charity called the Martin Parr Foundation, based in Paintworks, Brislington. Last year, we set up a community garden as part of a project with the Gaia Foundation, which has stands for exhibitions along with planters for herbs, vegetables, and wildflowers for the residential community in Paintwork

We are currently trying to source some circular stepping stones, along with plants and seeds for the project, and were wondering if anyone would be able to help or point us in the direction of any local organisations.