I found a image on eBay of Lea's meet outfit packaged in a Purchase With Purchase bag and tag. This led me to conclude that Lea's meet outfit will be a future Purchase With Purchase at American Girl. Or maybe it will be an AG Rewards Exclusive? I see it being a Purchase with Purchase as former GOTY items were Purchase with Purchases after the year was up, including Saige's Tunic Outfit in 2015 and Chrissa's meet outfit in 2011.
The outfit comes with everything, including the compass necklace, bag and shoes.