afni.nimh.nih.gov

Hello,
I am trying to locate the atlas datasets, i.e. TT_Daemon.Brodmannarea_*.BRIK/HEAD, for Brodmann areas 3 Left and Right to create masks.
I was told that they must be stored somewhere in the same directory as AFNI, but I couldn't find them.
Could anyone please help. I am new to AFNI.
Thanks,
Duong