Cast in place stones source

Hello all.

I’ve dreamed up this odd bronze project that I now want to put a
number of large c.i.p. stones in. I’ve got my Rio catalogue, but I’m
wondering if anyone has a good lead on where I can find green stones
larger than the 6x8 ovals they have in here. Or any other source,
really.

My thanks,
A- :slight_smile: