I recently discovered the Multi Purpose Poncho System (MPPS), also known as the Ecotat and Freedom Shelter.
Here's an old ebay auction for one, with a hefty price (as is common for these apparently): http://www.ebay.com/itm/USMC-Military-M ... 7675.l2557
What I'm looking for is a currently produced equivalent, that isn't nearly as expensive. There is one currently available on Ebay for a rather cheap price, but it's a bright blue color instead of a dark shade of green, tan, or woodland camo.