Ralph Lauren kids/baby Southwestern sweater

Very hard to find kids / toddler / baby polo by Ralph Lauren zip up wool sweater Buffalo on the front and US flag on the back Southwestern Navajo inspired design. Double RRL vibe. Leather pull on bronze RL zipper Size says 3T but it has been washed and it fits more like a size 18M-2T. See last few photos of the sweater zipped up to see the slight shrinkage around the waist.