Rob as much as we all appreciate your very "generous" offer
I am going to have to pass on it.
I wasn't supposed to say anything until this was all done and dusted but apparently my very dedicated girlfriend Joy has done a LOT of searching via the net and she has found a 2nd hand copy of the David Malin, et al, updated edition (book and dust jacket both in Very Good condition) for sale in ........ Toronto, Canada!!
(I guess they have pretty limited views of Southern Skies from there

)
She has received 2 emails now from the vendor, the first advising that her order has been processed ... and the second confirming that the book has been packaged and posted. Quoted delivery approx 30th April (not including customs delays, if any).
2 lessons in this:
First, persistance pays off.
Second, she's a
very good girl, and will need to be rewarded with
lots of chocolates, etc.
There is one down side : I'm Damned if I know what I can do for her birthday present in return that can possibly top this effort!