Yeah I have a few pieces I ended up not using and my backyard is 6 acres so I'm sure there's plenty more. I don't have any of the flat holey rock like in front of my overflows on my property though. There's a road not too fr from my house where you can find that.

I plan on trying some different live plants again eventually. I tried anubia since they don't like to eat it but they still tore it up just for fun.