[Last Edit: 12/29/2012 2:40:44 PM EDT by steve2071]
Not a KAC part, but it's pretty much what you are looking for. Dark Earth is what you want - specifically made to be the same color as KAC/LMT Taupe.
From the Cav Arms website:
"A note regarding Dark Earth furniture;
The Dark Earth Furniture we manufacture is the color specified for the Army's Semi Auto Sniper System. Our Dark Earth does not match Flat Dark Earth as sold by other companies. Our Coyote Brown matches Flat Dark Earth much better."