www.menshats.com has two pith helmets.

One of toyo straw that is available in four different colors. They aren't clear about sizes, for $25 guessing its one size fits all too.

The other is the one size fits all U.S. Military pith helmet for $45.00

Its a good company with top quality products, have ordered from them before.

Just type "pith" into the search bar.

Ron