You can't buy them, but you can request them. Just ask your boutique though, because they usually have extras in the back...and they are nice about giving them to you. I once called JAX, was told "no", so I argued, and the lady said ok and gave me a P.O. number. It took several weeks to get it, and it was only one medium size. I had requested 2 large bags. IMO JAX is not worth the hassle and wait. That's why I just go to the boutique. If one boutique turns you down, ask another, but it's best to ask where you normally shop. They were sooo nice and gave me 3 large ones last time, and I only asked for 2 !