Swans Island Patterns - Brooke Cowl is a similar pattern: 20 (5 sts. / inch) finished gauge, scarf garment, for women, and worsted (19-20 sts/4 in) yarn gauge. You may also like Grace Akhrem Patterns - Greenleaf Ascot, which is another similar pattern: scarf garment, for women, worsted (19-20 sts/4 in) yarn gauge, and malabrigo worsted suggested yarn.
You may enjoy taking a look at the Malabrigo Rios/Madelinetosh Tosh Merino Light Howlcat! Cowl (adults), Malabrigo Arroyo Darla Hat, Malabrigo Worsted Merino A Most Bespeckled Hat, and Madelinetosh Tosh Merino Rooty Hat kits all using Dull Roar Patterns.
Hopefully our suggested yarn options for Zam Hat can help you come up with your next exciting new project idea!