There were 2 schools in Florida which could continue CAA instructor ratings under an interim arrangement until June 30th this year, when rumour has it a final decision will be made on JAA training outside Europe.
However if you then want to work in the US you will first need the appropriate Visa, which one of the above schools is unlikely to obtain for you.
Also to instruct legally you will need appropriate FAA ratings aswell as your CAA ratings. Are you prepared to go the expense of this ?