A mod adding carbon fiber clothing material, carbon composite building material, and diamond building and tool-making material for B18 would be great. There was one for A17 but I can't find it anywhere anymore.
Maybe Titanium will fill your needs.
https://ludeon.com/forums/index.php?topic=34372.0
Oblitus (https://ludeon.com/forums/index.php?topic=34628.0)