
I can thoroughly recommend Star Wars Omnibus - Wild Space Volume 1, nearly 450 pages of odd collections of Star Wars stories, from cereal boxes, toybox comics, and many of them being back-up or filler strips in the UK Star Wars Weekly Comic (Which I have fond memories of to this day).
Because of the era, this means that some of them are by the likes of Alan Moore, and Alan Davis, then bright young things at Marvel UK. Alas some of them are only 5 pages long, and are in their own way, little gems of storytelling, but alas, hacking up a 5 page story to fit the 1/3 rule is often deeply counterproductive, so I'd rather not try (So go buy the book!)
This is a 15 page story written by Steve Moore and John Stokes on art though, from Star Wars: The Empire Strikes Back #149
( Death Masque )