license verification letter from the issuing aviation authority. Cause getting those stuffs means Mission Impossible to me...
That might put a fly in the ointment! Why would obtaining those things be a nightmare? You can get your hours countersigned by your current employer and an Authority to Authority check of your licence number should provide validation. Assuming you would have to gain a US ATP then I would take it as read that the FAA would want verification of hours and qualifications prior to US license issue.
All that after the various Visa's/Green Card/Employment issues.
Perhaps a letter to the FAA might help.