Indeed - I only managed to get a copy of the confuser by pleading with other forumites (on a different forum for flyers).
No luck on amazon, Waterstones cancelled my order after 3 weeks, wasn't anything on ebay, tried lots of other online book stores, nothing in aviation shops.
I presume it was out of print as people believe it was coming to an end, although I've heard rumours about some sort of dispute.