We bought the Harmony folding travel booster for my older daughter and are very happy with it. My younger daughter is too little for a booster right now but I just noticed that the Harmony has been discontinued. Are there other alternatives to the Harmony that are similar? We really need something lightweight, foldable, and high-back. If there is nothing else out there, I may buy a very overpriced Harmony booster from someone now and just save it until my younger daughter needs it (assuming that the expiration date isn't too soon). Thanks for your time!