Hey, our Old Navy didn't have that particular jacket...and I'll be looking for it now. They did have a syn-fill vest that we bought for our 11-year old Scout, as a component that goes over his inner layers (his system is a tech shirt or long underwear, fleece, vest or jacket, Marmot PreCip shell). The price is right and, although it's not UL, it's pretty light and has a very durable shell on it (more than the jacket linked).
Of course, warm gloves and a good winter hat he enjoys wearing is crucial. Oh, and dry feet can be warm feet, but wet ones cannot, eh?