trot - as is so often the case, you do not give sufficient information in your question to attract the correct response. I take it that you are not seeking a JAA CPL/IR.
I assume that you have more than 500 hours experience in a multi-pilot type and that you are intending to take the ATPL Skill Test on that type in order to get a JAA ATPL based on your FAA ATPL.
If this is the case, the test must be observed by a Flight Ops Training Inspector from the CAA, of which there are few - maybe one or two per type. None is based in the USA and the costs of arranging for one to observe a test in the USA would probably be prohibitive - for a start, you'd have to pay for a round-trip Business Class ticket as well as all accommodation and subsistence costs, and then there's the charge-out rate......
You can complete an approved multi-pilot type rating course and have the examiner observe the Licensing Skill Test, which is essentially the same as the ATPL Skill Test, but the same deal applies - it's too expensive to be a realistic option in the USA.
moggie - One recommendation for that organisation might be considered an error of judgement, two in the same day begins to look like marketing. In any case, assuming that we're talking JAA ATPL, it's not a realistic option in trot's case - what a lucky escape!