I think it was 'The Works' branches of shops used to sell a range of different manuals. F1 cars, jet fighters, etc
I had seen those Fly {although no big call for them round here} I would suspect a collectors item for an enthusiast, but Stephenson's rocket, it's like finding a manual for Boadicea's chariot or the inner workings of a sedan chair!
Speaking of Haynes manuals, I bought one 5 years ago when I got a 2nd hand fiesta, apart from flicking through it it's like new, six months ago I part chopped it and got myself a 2nd hand fusion, got myself a Haynes on the fusion. It appears {to me anyway} that the vast majority of what's in the fiesta one is replicated in the fusion one, after all when you look at the fusion it's just a longer fiesta with a transit connect front.