Well, as mentioned in the above post, I managed to pick up the Calder Craft Robin Hood Adventure Gaming booklet along with the painting and adventure gaming guide. They are lovely old school publications and a great read. The illustration are the same type as the Hinchliffe Collectors guide from 1976 although I'm not sure of the illustrator (unless it was Norman Swales the equipment piece designer who still designs models today?).
The Adventure Gaming booklet
The Painting and Adventure Gaming Guide
(this is just an A4 sheet folded over)
Still looking for the boxed game of course and the other figure packs...