Addendum : My best online resource for ponchos and liners is
www.MajorSurplusNSurvival.com here in California. They have several nations. Ponchos are wonderull, if nothing else for portability. I've found the liners help keep the poncho draped in wind. In a survival situation nothing else is as versatile for rigging an expedient shelter. Some ponchos have a waist drawstring. I replaced mine with a doubled length of paracord. Its just right for stringing a ridgeline. This is hardly a 5 star hotel, but the poncho detractors have never gone out with nothing. A new,G.I. woodland liner is @ $35 from Major