A good source I've found for survival clothes is U.S Calvery. They are an army surplus/survival store. I bought a Swiss Army surplus wool great coat from them for $19.95 USD, and it's warm! They also sell new products, that I think are a bit overpriced, but the army surplus stuff is great! They also have wool pants, and surplus wool blankets.
Offered by Brent.
Beware of Camo Clothing! Being shot for impersonating a soldier or taking the clothing from a soldier is a possible in times of martial law or no law.
Offered by Bobby.