Whoa there G-RICH.
Indeed you CAN teach for JAA on an FAA instructors ticket - just needs a short conversion course.
Having said that, I believe that Bob wants a JAA course - but not in the UK.
Only place I know of (that I would be able to say anything nice about) would be European Flight Training in Ft. Pierce, Florida (but have some nagging doubts at the time of writing - which I would have to check out first).
Personally - I would go with On-Track as already mentioned. Great bunch of guys - and VERY professional.
Despite the regulations allowing an FI course in USA - you will get a better end product if you stay "at home" (opinion - not necessarily fact!!).