Unequivocally impossible to acquire such records through the Freedom of Information Act. Look up the Privacy Act of 1974.
Try to FOIA someone's tax return - after the IRS agent stops laughing, he'll call security.
I would add, that Federal Agents can't access those records without a search warrant signed by judge. Sorry!
If such records are floating around (which I highly doubt), someone committed a felony obtaining them. Just ask the two state Department contractors that are still under federal inquiry.