I think that you're referring to Game Hollywood, which sadly closed doors several years ago.
Trader still has some western stuff from time to time (especially for the newer systems), so there's that.
Also there's a small store (well, booth or stall is more accurate) called Kadenken (http://kadenken.com/) which seems to have western Master System and NES stuff. It's actually pretty close to the Game Hollywood location, so I'd like to think that they're carrying on the mantle of Game Hollywood in a way.