World Of Fire," which was originally printed in the UK Star Wars Weekly 107-109. This collection is black and white, with the panels rearranged somewhat to fit the format.
If you would like to learn more about the original Marvel Star Wars, I would recommend checking out the Star Wars Monthly Monday podcast, over on the Two True Freaks Internet Radio Network. Scott Gardner and Chris Honeywell covered every issue of the series, plus the "wild space" stuff like these UK stories. In fact, they covered "World Of Fire" in episode 60! Give it a listen, you will not be disappointed.