I'm not sure if that site is military issue for sure and this site
http://www.georgia-outfitters.com/index.html has AUTHENTIC ENHANCED GOVERNMENT ISSUE they claim. I'm not sure if US Calv or who else might sale them? I know they have an assortment of blends, and cotton is a big no no. I'll still keep looking around to find a site other than getting a friend to buy them on base.

http://www.georgia-outfitters.com/woodland.shtml

TRU-SPECŪ WOODLAND 60% COTTON 40% POLY TWILL PANTS
(MADE TO US MILITARY SPECIFICATION MIL-T-44047E)
(MEDIUM WEAR - ALL CLIMATES)


TRU-SPECŪ WOODLAND 100% COTTON RIP-STOP PANTS
(MADE TO US MILITARY SPECIFICATION MIL-T-44047E)
(MEDIUM WEAR - HOT CLIMATES)

_________________________
Failure is not an option!
USMC Jungle Environmental Survival Training PI 1985