Remember ACU refers to the CUT of the material (BDU, DCU, ACU) and ARPAT is the actual camouflage pattern
I wouldn't buy fake arpat, it's REALLY obvious if it's fake, real issue arpat ACU's aren't all that expensive anyway when you think about it. Around 100$ for a set of ACU's that are going to last you 4 years or more!
Just follow the washing instruction to the letter and they won't fade