Onewind 12×10 ft Camo Camping Tarp, Billow Tarp Shelter Lightweight Waterproof Hammock Rainfly for Stealth Camping Army Military Bushcraft, Easy to Setup with Tent Pegs and Guyline, Camouflage

Most 1P hammock tarps about about 9.5 feet wide and 11 or 12 feet long. Dutchware Gear has some wide tarps that are 11.1 feet wide. OneWInd has a 14x13 tarp on Amazon. That's going to be both wide AND longer that your typical hammock tarp. Kelty also has some big tarps in their Noah tarp line that are big. I don't have any first hand experience with any of these tarps or tandem (side by side) hammock camping.