What dresses would be good for an Alice in Wonderland costume?

A friend and I are dressing up as a somewhat updated version of Alice in Wonderland, and The Mad Hatter.
I'm not a huge fan of the more revealing pre-made costumes.
And I wanted something somewhat like this:

http://www.misscedar.com/wp-content/uplo...

Where a cute blue dresses that you think would go well for the outfit.

Thanks.
What are some good sites with dresses that would work?

If you are wanting a modern/updated version of Alice, I would go with a dress in any solid color (any shade of blue, pink, black, whatever!) then add the accessories she is known to wear such as the white apron, white socks (maybe even socks that are striped with the color of the dress), black mary jane type shoes (could even go with heels or platforms to update the look) and a black headband. If you want to carry something to add on to the costume, paint up a bottle with fancy detail and attach a tag that says "drink me" or carry a little lunchbox type of container, and you can make cookies and write "eat me" on the cookies, and you can give them to your friends!

Edit: Sorry, I meant to include some links for dresses. I personally don't think it has to be the "exact" style of dress that Alice wears, especially since you are going for an updated version. And part of Halloween is doing your own thing and working with what you've got! But here are some links to solid-colored dresses, maybe you will like one or at least get some ideas of what you want to look for...

http://store.americanapparel.net/rsas313.html

http://store.americanapparel.net/4387.html#i

http://store.americanapparel.net/2359.html

http://store.americanapparel.net/rsag300.html

http://www.urbanoutfitters.com/urban/catalog/productdetail.jsp?itemdescription=true&itemCount=60&startValue=61&selectedProductColor=&sortby=&id=14470611&parentid=W_APP_DRESSES&sortProperties=+product.marketingPriority,-product.startDate&navCount=48&navAction=poppushpushpush&color=

http://www.urbanoutfitters.com/urban/catalog/productdetail.jsp?itemdescription=true&itemCount=60&id=14957914&parentid=W_APP_DRESSES&sortProperties=+product.marketingPriority,-product.startDate&navCount=21&navAction=poppushpushpush&color=01

http://www.urbanoutfitters.com/urban/catalog/productdetail.jsp?itemdescription=true&itemCount=60&startValue=1&selectedProductColor=&sortby=&id=15171986&parentid=W_APP_DRESSES_SOLID&sortProperties=+product.marketingPriority,-product.startDate&navCount=21&navAction=poppushpushpush&color=

http://www.urbanoutfitters.com/urban/catalog/productdetail.jsp?itemdescription=true&itemCount=60&id=14430573&parentid=W_APP_DRESSES&sortProperties=+product.marketingPriority,-product.startDate&navCount=21&navAction=poppushpushpush&color=01