If you're going to Des Moines, there are a couple of shops in Valley Junction and one in Clive that I really like. And if you get up to Kalona, you have to let KJ and I know so we can try a meet-up!
Incidentally, I thought for years that the Amana Colonies were settled by the Amish, and I couldn't figure out why they didn't dress like the pictures I'd seen of the Amish!