This pattern is not in the magazine Interweave Crochet, Spring 2007. It is web-only.
WHILE EXPLORING THE IDEA OF ARAN-STYLE GARMENTS THAT ARE CROCHETED rather than knitted, designer Kathy Merrick was struck by how often crocheted Aran-styles look lumpy, awkward, and rather uncomfortable. Figuring that the difficulties lie in using a heavyweight yarn and in trying to replicate knitted stitches that are not wildly attractive in crochet, she uses sportweight yarn, instead of worsted or Aran, and smaller-scale stitch patterns, not cables or heavy stitches.
-- description from Interweave Crochet