There are none. The JAA IR Skill Test, and the preceding F170A flight must be completed in the airspace of a JAA member state.
If you have already completed half of the flight training for the IR, there is very little point in going to the US. The money you will save on the remainder of the course (less that mandated to be flown in JAA airspace) will most likely be insufficient to cover the cost of fares, food and accommodation and the necessary visa.