Where an i buy Disney girls costumes for adults?

1st- I need the dress Ariel is wear in Kiss the girl, 2nd- I need Belle's blue dress when she is singing Belle, 3rd I need Snow Whites Blue and Yellow dress, 4th I need Aurora's blue dress, 5th Giselle's blue dress (the one that she is wearing in "how does she know"), 5th Meg's purple dress. I know these exist because I typed in their names + Cos-play and it came up.