Tot Toppers Patterns - Snugglebug Car Seat Cozy is a similar pattern: blankets and afghans garment and dk (21-24 sts/4 in) yarn gauge. You may also like Madelinetosh Tosh Patterns - Arrow Cowl, which is another similar pattern: 17 (4.25 sts. / inch) finished gauge and dk (21-24 sts/4 in) yarn gauge.
You may enjoy taking a look at the Cascade 220 Great American Aran Afghan Blanket, Cascade 220 Great American Afghan, and XRX Great American Aran Afghan kits all using Knitter's Magazine Great American Afghan Patterns.
Hopefully our suggested yarn options for Great North American Afghan can help you come up with your next exciting new project idea!