This little gem has been almost perfectly preserved by my Dad from when the Explorers were first released. It features a short story and a centre page showing the four vehicles and accessories. The front cover and story were all illustrated by Mike Noble. This really is a very rare Explorer item which I very much doubt you’ll ever see one again! Download from this link.

Right click on the item and open new window as Google doesn't like iFrames.
https://drive.google.com/drive/folders/1gZi3e2gszAxWj9bLyK9Tk0z7DuZJKpCI?usp=sharing