R.D.
I wear a 5.5 or a 6, depending on the show. NO KIDDING it's hard to find shoes!
Try DSW or Zappos online, that's where I've found a lot. Just read the reviews to see if they run big or small so you know which size to order :)
It's not hard at all to exchange shoes, usually, it's usually pre paid and you're not charged anything if you're exchanging the shoe. Zappos has the BEST customer service EVER.
BTW, I most definitely have no problem shopping the kids section ;)