Photograph the rock already in your beds, or the shrub you want three more of. We suggest the closest matches from our catalog; you say which one is right, and we show the yards near you that carry it. Plants and material both.
Wet rock and dry rock are different colors. Two maples in October are the same tree to a camera. A photo narrows the possibilities honestly; it does not settle them, so nothing routes anywhere until you confirm which suggestion is right. Where a match is a plant, price and availability come back from the yard, because what is on the bench changes daily and no page here will pretend to know it.