I would get them where you are if you can find them. Friday they did have some in stock at Oaken's Trading Post, but that is the first time I have seen them anywhere at WDW during the last 2 weeks. They had Anna dresses too. They were $65 I think, but I didn't really look at them because we didn't need any.
I was at the mall doing Back to School shopping last week and stepped in to the Disney Store randomly to check out their plush selection and they had a lot of the Elsa costumes.
I wasn't planning on it but went ahead and bought one for my daughter. I think I paid around $45?
I saw a really cute anna and elsa dress from Chasing Fireflies; however they are quite expensive and depending on the sizes needed and time frame it may not be feasible. But they definitely look really cool.
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