Here are a few of the other collections I’ve found online for USA Bicentennial items. If you know of more, please let me know!

This fabulous collection represents some of the great diversity in products offered as part of the US Bicentennial celebration by corporations: Bicentennial Junk

Holly City (Wheaton) paperweight collection: Holly City Bottle Company

An eclectic collection of items at this Presidential Library: Gerald R. Ford Museum & Library

Searches on eBay and Etsy also reveal a plethora of memorabilia.

• eBay: Bicentennial Plates

Wikipedia has some generic background on the American Revolution Bicentennial

Join the Facebook group: USA 1776-1976 Bicentennial Collectibles and Memorabilia