Paint & Body Work - two part molding foam ?

Hey guys I'm starting a new wing project using a ss wing as a base to start on , I did some reading around on the best way to tackle this project and it seems that using a molding foam to get my shape right first will work the best
Anyways I read I need "two part polyureathen foam "
I have no idea where to buy this and really what I'm looking for.
Any help is appreciated

Bump , halp

http://www.uscomposites.com/foam.html

Also know as insulation foam and comes in a spray can. Can be bought at any hardware store but the two part mix is special and will need to be bought online or at a specialty store.

You want the two part foam linked above, the spray can foam is not the same. Two part urethane foams expands after being mixed and poured, and a chemical reaction causes it to cure. Within minutes, it will be fully hardened all the way through.

Spray can foam air dries, and sometimes the inside doesn't fully cure and stays soft.

Get this stuff!! TAP is a top notch company and is very willing to help. There is also tons of info available on their site.

http://www.tapplastics.com/shop/product.php?pid=79&