There is a large map collection at the university where I work, and a number of them were on loan to a museum in Austin a couple of years ago. One of the maps in the exhibit was actually the personal property of a professor who helped curate the exhibit. It came from M-SAT in Rockville, MD, and was called "Texas From Space." If you visit here you'll find a number of maps for sale by this company. They have various parts of the U.S.
The cover story in this newsletter talks about the exhibit and gives some information as to why Dr. Francaviglia chose this map for the exhibit.