Call me crazy, or deluded, but some dude (actually he claimed he and his brother) scanned almost all the US manuals and made them available as .pdf's a few years ago (6+) on the magicengine.com forums. 
I only downloaded one or two, because I was curious, but I wish I had the forethought to download everything. IIRC, this fellow had made a simple website and one page featured links to all the files. 
Anyway... If one of the old-timers saved everything, we would have ~entire US library of manuals.