Did you check out Banana Republic? Mine has tons of them - I've gotten a few really cute ones there. Otherwise, look @ them on their website. I'd also try Target - I got a couple there too.
I also got a really great silk headband from a designer named Rachel Weissman. I got it at a local boutique here, but I just googled her and she seems to be sold at lots of online boutiques. The headbands are slightly pricey, but I think they're worth it.
"i tell you one lesson I learned
If you want to be something in life, You ain't gonna get it unless, You give a little bit of sacrifice, Oohh, sometimes before you smile you got to cry.." -The Roots