Hey goof ball....I've been storing live rock in my refurium for you and Brent for months now! Everything is nuisance and pest free, heavily covered in coraline. I have several softball sized pieces, and a bunch more just a bit smaller, all the way down to rubble, large shells too that make nice frag plugs. Come over any time you want and you can pick whatever will work for you. Unless you really want them, leave me the mini brittle stars, you can have all the copepods though and some of the macros.
I work Mon-Wed but have Thursday-Monday off. We'll figure something out. I have several things that will work for your bio-cube. JUST DON'T BE A STRANGER!!