Just a heads up, went to DJ's last weekend (sydney, cbd) and saw them have the Amouage line on display, which i believe is very recent (~couple of weeks) and Costume National as well as Vanclef and Arpels Exclusive Line.
They had most of the common Amouage ones available such as Lyric, Dia e.t.c.
Costume National, the entire line
V&A: entire line.
Didn't check the pricing on Amouage, but expect it to cost an arm a leg.