well, as you said supply captain makes has acu. ICE Tactical has soem of it as well... If youre in Vancouver, Urban military has ACU baseball hats and boonies. theres some ACU stuff on panther that ive seen. Also, look at US cavalry (
http://www.uscav.com ) as they have a decent amount of stuff as well.
http://www.galaxyarmynavy.com . they have ACU as well.