Do you have Dora the Explorer/Spiderman/SpongeBob/Elmo/Barney/[insert favorite tv character or specific Disney princess or pirate here]?
No. Partly because some of those are full-body costumes (see above). But mostly because those are licensed characters so legal costumes are either impossible to find or ridiculously expensive. If I ever get sued for playing Velma without permission from Hanna-Barbera, that will be my problem…I like Velma. But we prefer not to risk copyright infringement.