I should have known this was going to happen. BuyCostumes.com has this 'costume' for sale.
Here's the description:
Enter the "world of men" as the powerful princess, Wonder Woman.Equipped with her “Lasso of Truth” and Amazonian berserker rage (used only in the most dire of circumstances, of course), Wonder Woman is one of DC Comics' strongest superheroes. Channel your own resilience in the Wonder Woman Deluxe Adult Costume. It includes blue Capri-length pants, Wonder Woman's signature bustier top, matching jacket, a character headpiece, Wonder Woman belt and coordinating arm gauntlets – everything you need to bring the world’s villains to justice!