What about H&M? Before you shoot me down for suggesting it, I actually haven't looked at H&M's suits. I've just read that they are slim fitting, have high arm holes, and are cheap. Did I mention cheap? Don't expect quality. But I think they're cheaper than J. Crew. And if the suit is going to be disposable, might as well buy something with high arm holes and spend as little money as possible while still looking decent.