From what I've seen, no. Ive been to tropical world, aqua world(city). My recommendation is go to some landscape supply like kirkwood supply. Find something similar or make your own. U can use muriatic acid to dissolve the softer minerals in rocks. There is actually a post on this site doing just that. Wish I new more of that post but cant remember. Try;making seiryu stone.
either way post an update if you find a place.