OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
De Havilland Vampire F1-T55 in RAF - FAA - RAAF - RNZAF - SAAF - RCAF & foreign service by Richard Ward. ISBN 0850451345. Published by Osprey Publishing in 1973. Publication and catalogue information, links to buy online and reader comments.