I used to stock these at MJP a few years ago, but requests dwindled away to almost nil. If there is sufficient interest (say ten copies), I can do a small "bulk buy" and get you all a bit of discount!
I am assuming that Haynes still have this one in print - the 240Z/260Z and 280ZX versions seem to have disappeared altogether.
The Nissan workshop manual for '84 to '86 and the supplement for '87-'89 may still be available, but expensive new (last price was about £45 for the main manual). I can enquire if required.....Sometimes members sell these or they crop up at autojumbles.