Air Bus Driver,
Converting from JAA to FAA should not be much of a problem. As far as I know, and I'm NOT an expert on this by far, you have to do the commercial and instrument written test, and a check-ride, but I may be wrong. Check the FAA.GOV site, look under Part 61 in the regulations. You should find info regarding converting there.
With your hours and experience, you should be able to find something over here, no doubt.