Yes there is. Here is a link to it at the Black Diamond website. It is priced there at $44.95. http://www.blackdiamondequipment.com/en-us/shop/mountain/shelters/skylight-ground-cloth

I'm not sure why Backcountry would sell the tent but not the ground cloth but maybe its just a mistake they don't. You should be able to get it directly from Black Diamond or they probably have a link for retailers that would have it.