I bought mine almost 2 years ago. But this is the closest thing I could find that should be similar. http://www.homedepot.com/p/Daltile-Continental-Slate-Tuscan-Blue-6-in-x-6-in-Porcelain-Floor-and-Wall-Tile-11-sq-ft-case-CS56661P6/202623250
Pretty sure the 18 6x6" tiles I have was under $30...