Theres a wall that im interested in soundproofing (or deadening as much as i can). Ive researching sound deadening materials like Linacoustic and Eggshell Foam but cant find a place to procure quantity of this stuff. -The interior wall that needs soundproofed is 9'3" x 7'5", and it is currently just painted drywall. -I would prefer the material to be a black/white/grey color unless its paintable. -I'd like to keep costs to a minimum (~$100-150), since the wall isnt in my house. Any help in what to use and where to procure it would be GREATLY appreciated.