search ebay "gortex ecwcs parka"
http://adventuretech.com/ecwcs_gen_2parka.html for manufacture site.
standard ecwcs (extended cold weather clothing system) for the US army is made from gortex and have all the same attributes of other ski jackets but for sooo much less and will last for so much longer.
few jackets here:
http://www.liquidationlink.com/servlet/Categories?category=Military+Clothing&searchpath=ac1c0a651088a25bd53af77&start=1&total=36