DarkGruson: If it can be proven through a trial run on some 35mm trailer film or such that this person you speak of has the skill, equipment and willingness to do a high quality scan of all three movies, then please get to it without further delay!
Just make sure you bring plenty of big reliable hard drives with you to store the scans (which then must be backed up onto multiple sets of additional drives at several secure locations ASAP once you are safely off-site, so that it's effectively impossible for anything to happen to the scans once they are gotten). And, of course, keep all discussions of this private and tell only those who absolutely must know about it.