Nancy, if you want to get small amounts of wadding, then I suggest you head for your nearest patchwork shop, or if you've got one near you, try Fabrics Plus, or Hobbycraft. If you want to go online, then try The Cotton Patch. They're very good, and will normally send you your order by next day delivery, but unless you get a crib size pack, then you'll have loads left over, and need somewhere to store it. They will also have loads of different types of waddings. I always use Warm and Natural 80/20 which is what I use for quilts, and this works very well with the box, but they also do ones such as "green" wadding, which is made of recycled plastic bottles, and is also quite good, but a bit more expensive. If you don't want to spend loads of money then if you've got an old woollen blanket you don't mind cutting up, then you could use that, which is what people used to use before commercial wadding came onto the market.
Hope this helps you, and let me know if you manage to get any. Good luck. Barbara