I'd like to get some Tyvek maps, both topo maps and regular street maps of a few U.S. cities.
Where can I get these?
Palomar do a few US cities in their Crumpled City range - San Francisco, New York and Chicago.
The Find do a range of Trail and National Park maps in Tyvek (scroll down on this page to find them)
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.