The English name is salep, and it used to be a popular drink in England in the 18th century. See http://www.botanical.com/botanical/mg...
Salep is available at several places in Brooklyn. There's one on Coney Is Ave near the corner of Ave N (near Shnitzel King), and one on Kings Highway near Pita Sababa (near E 4th). I've not tried it at either place, so I can't comment on the quality. I'm actually surprised that Amazon Cafe hasn't got it.