Anywhere I can get 1-6" styrofoam online?

[Pilotr2020]

I have not seen anything sold on amazon, but does Uline, or anywhere else sell styrofoam, or blue dense foam online?

 

[Piotrsko]

Aircraft spruce if you can get to fullerton, shipping is stupid $$$$- on foam. Otherwise see who manufactured what you want, they probably have commercial outlets semi locally because you are buying a billet. Fiberglass supplies comes to mind also. Home improvement places have it as building insulation but only up to 4" thick. Sometimes it's the blue high density stuff. Boat supply places have dock floats.

 

[Merv]

I agree with @Piotrsko, you are better off looking local. Most places that sell construction supplies will have some kind of foam sheet goods. In my part of the world, they use foam under stucco.