HalfofLouisVuitton's 'Business Bags' feature shoulderstraps, while Hermès--whose Sac à Depeche may bethequintessential soft-leather briefcase--offers 'documentholders' with straps.
The full details of FATCA have yet to be ironed out between the U.S. Treasury and the IRS, but one of its requirements will include a document for new account holders to sign that waives whatever rights they may have under local banking secrecy laws.