Hi John,
My company (HSL) now offers over 24 different volumes of train hobby-related digital archive products. There are four products that contain much in the way of standard gauge material including one that covers the entire American Flyer Chicago Era. Please click on this link for more information: http://www.hslinc.com/dahome/dahome.html .
The American Flyer Digital Archive 1907 - 1937 contains all known consumer catalogs, many dealer catalogs, and a variety of bonus material. Full details are on the web-site. The Lionel Consumer Catalog Digital Archive volumes contain a wide variety of information above and beyond just the catalogs.