Cap, what are you asking for the plants in money terms? I like the look of that second pic but have none of the repens you seek.
I have some marimo balls if you're interested... one is approx tennis ball sized but somewhat irregular in shape, another one maybe pingpong ball. (I got a large one and separated it into smaller pieces for a tree-simulation project.) Also available is a large quantity of riccia (netting supplied free if you'd like to attach it to something to grow out). And najas/guppy grass, if you would like such a lowly common thing.