Robyn,
It's "The Arcadian Shop" in Lenox, MA:
http://www.arcadian.com/

Apparently they have sold small amounts of Ibex items for a long time, but now they have a whole section of Ibex for men and women. My friend was there when the Ibex reps were putting the finishing touches on the "Ibex mini-shop". If you go, be aware that there are a few Ibex items sort of hidden in their cycling area as well to check out- like El Fitto knickers and Ibex wool cycling jerseys.