I think ACU is the camo scheme. But its also a different cut than BDUs are. As far as I know the main differences are things like the pockets being in better positions for use with armour and a mandarin collar.
Anyway if it is infact a colour scheme then I don't know if they sell it in other colours. You can get RAID BDUs which can have the pockets and collar like on ACU uniforms.
RAID some custom stuff, but you pay for the work.
Some soldiers did the changes themselves and its not too difficult to do. I did the pocket change for use with airsoft.