Just look in a basement somewhere. You'll probably find one.
I found my ENTP when I moved to Virginia to start a film making internship that operated out of the producer's home office. I was on my laptop and noticed the ENTP was watching me. Finally he said, "You know, there's a shortcut for copy/paste."
Also, he was really really really really quiet. He was like a ghost. He'd been kind of alienated most of his life, so yeah. :/ But then he started coming out of his shell, and boy does he talk!