Thanks a bunch everyone for your ideas. I feel confidant now that I can get what I need and not have to run the risk of bag nazis at the airport. ISO 3200 going thru a scanner is not my idea of a fun time! Even with a barium lined bag and a request to hand check I still the usual arguments about "film safe" x rays.
BTW David (mdm above) who asked why...I shoot a lot at night on the streets (think Brassai/Paris nights or some of Gene Smith's NYC in the 60's) but rather than long exposures to make anything that moves disappear I like to see people.
Again friends thank you very much for you collective ideas! cheers for now, sam