Are you sure about HMV? By my calculations it's only about £17.
http://www.hmv.co.jp/en/product/detail/3953503
According to their table, shipping is about £12.
CD Japan might be another option:
http://www.cdjapan.co.jp/detailview.html?KEY=PCDT-29#
About £18.50 for the disc, and SAL (Surface Air Lift) shipping would be about £4 to £6.