There is large stone slab added, that looks like white armored industrial stone.
http://www.minecraftwiki.net/wiki/File:Newstoneslab.png
http://www.minecraftwiki.net/wiki/Slabs#Future
It possibly will be implemented in 190-1100 vanilla, but currently this will be great addition to IC2's armored stones.
I suggest 9 smoothstones as one such stone and armored stones recipe as single alloy and this stone.