Came across this while surfing:
http://www.cheaperthandirt.com/ctd/product.asp?sku=KEY%2D147&mscssid=AQN1SGGQ4X1S9LF807GQQVGQ9FCL7XX5
Described as:
Original British ground cover complete with reinforced ripstop tarp that measures 4'9"x8'6", six stakes, and line to secure the tarp...