I'd like to get some Tyvek maps, both topographical maps and regular street maps of a few U.S. cities.
Where can I get these?
Palomar has a line of waterproof, soft, pliable maps called "Crumpled City". They have cities all over the world. Some in the United States include New York, New York; Chicago, Illinois; San Francisco, California; Boston, Massachusetts; Miami, Florida, and others.
I suspect the answers will be scattered. I don't know of any one source of Tyvek maps that cover everything.
For the White Mountains of New Hampshire, the AMC publishes quite decent trail maps in Tyvek. Unfortunately, the White Mountain Guide book comes standard with paper maps. You have to buy the Tyvek maps separately. They cost more, but I find them worth it. They really do stand up to abuse and wetness very well.