There is a guy in cullman AL who sells his Live Rock for 3-4 dollars a pound. Its good stuff that is what I used to stock my 110. Are you going to the Nashville swap he might ba able to bring it up to you.
If you are not able to stop by the LFS in knoxville, you may be able to give them a call to check their prices for LR. Just let them know how much and ask if there are any deal of anything. Good luck