Can't recall whether they have them in the parks or resort gift shops, but we purchased one from the Disney Store online. If you don't find one, you can always order one later. I think we got ours for about $10 when it was on sale.
I know they have barbie at the once upon a toy store. They had some princesses too. Also the world of disney store in DTD had a bunch of princess dolls like that. I just can't remember if they pocahontas.
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