The US military issued OD kit with US Woodland BDU's (I'm thinking LC2 pistol belts and ALICE gear) so that would be your closest bet.
I read somewhere that CADPAT is 40% more effective than OD. I figure I just need something that breaks up the pattern.
I wear whatever I have handy. I wore a DPM rig on ACU (UCP) last week in a skirmish.
I have an ACU rig bit it's for a pistol and I was fielding an M4.