Where can I find large (2' x 2') foam blocks/foam boards?

[woolio1]

Alright, here's the story. I'm preparing for my first real installation, and I've decided to make it out of hard foam. However, I don't know where to buy said foam, as no amount of Googling can find it. Any suggestions (that won't kill me with shipping fees)?

For some idea of what's going on, this is the installation.
[img]http://db.tt/RFuHcTD[/img]

[Nyaa]

Can't you get this kind of stuff at any building firm?
Like a place where they sell stuff for building your house and such?

If you can't get them thick enough just glue or sew them together.

Also from yahoo answers:
[quote]
Generally people use the pink or light blue polystyrene insulation sheets for sculpture. You are not going to get them in the required size, but you can glue pieces together for the required thickness. At least the larger hardware stores will have them, but also other building suppliers.
It carves much better than the white styrofoam, though it's still a mess.

I think people use wood glue for gluing sheets together, though not quite sure. Experiment on small scraps for glues containing solvents probably melt the polystyrene, though probably less than styrofoam.[/quote]

[k00lwhip]

You live in America, so I can say this, Hobby Lobby.