OK this finally landed in the UK for me today. I ordered it right away when it was mentioned in this thread (thanks Henry). It cost just over $51 when they added the additional postage. No worries about customs charges since delivery came via a UK distribution agency of some kind.
It's a DVDR and CDR housed in one DVD case, nicely printed. The last chapter of the main hour long documentary features brief Horner interview & footage (about 6 mins worth). The music video in the DVD extras is the 12 minute Flight demonstration music, and is quite spectacular really. Overall an unusual and rather cool addition to the Horner collection, but very expensive...
Sounds like this fellow Horner fan needs to buy this baby, thanks.