Good Afternoon  
I want to surprise my friend with a birthday gift.  
He has a fantasy about Clown fun.  
any recommendations for someone here in NYC that is willing to dress up as a Clown for him?

Lol I don't think this fetish is something that would be listed prominently on any girls site. Most girls take outfit requests and will probably wear anything you get for them if they don't already have what you are requesting. Let's face it, likelihood of a NYC girl having a clown outfit is pretty low.

Amanda Manhattan might, reach out and ask.

I do not have any recommendations, but I imagine your friend might have to be screened depending on the lady.