Bits of stone and rock for Japanese path (Presteigne LD8)

I am interested in small or larger quantiles of flattish or rounded stone that I can use for the entrance to the Welsh Marches Japanese Garden I have created with the help of some many people on Freegle. I have some fabulous old slabs from a coach house in Weobley. These are the core from the parth. But as you will see in the photos, the tradition in Japanese is mix and match. So it might be that you have just a few pieces I can use or some larger ones or more of them. Please get in touch if you do, as I am doing the entrance path soon and want to make it very special. I also want, as the rest of the garden, to make it of this place so I want a selection that shows the geology of the Marches. Thanks