Are there bureau de change in major cities in the United States (such as New York, or San Francisco) offering competitive rates (say within 1-2% of the current mid-rate for major currencies?). Banks and Travelex offer less competitive rates and generally have a small selection of currencies.
(I recognize that this may not be the most effective way to bring money overseas, as suggested by this question on how to take currency).
Singapore, for one, has a number of bureau de change (at the rather appropriately named Change Alley) offering relatively competitive rates, and I'm wondering whether this is simply not the case in the US.