I'm working w/ a researcher who's "working to trace the disappearance of several people from the Saigon area circa 1957-58, and to reunite the family members, including children, who were separated.": He's looking for (very large-scale) street maps. Ideally,
said maps would show both street names and, if possible, block/building numbers. Looking for suggestions. Here's what I've found so far:
Perry-Castaneda (UTexas) has a 1:10k map produced by the National Geographic Service of Vietnam ca. 1961, then copied and distributed by the US Army as Series L9012.