I have a 1983 54 cm Expedition that I picked up from craig's list a while ago. It came with all original parts, including Suntour Mountech derailers and Shimano Deore brakes.

I have been commuting on it this summer and greatly enjoyed it, even though it's not my ideal size (56 cm would have been perfect; if you were in the SoCal area, I'd love to work out a frame swap with you!).

Hope your wife could fit it comfortably and enjoy the bike!