there is cheap pink foam available in East Ctrl MO

I'll be purchasing some soon but it's a reoccurring ad on craiglist for 4'x21' x 1 1/2" pink foam sheathing with tongued and grooved edges. The come from poultry houses but would still be usable for lots of things. I'll be using it for foundation/umbrella insulation(two layers, overlapped seams, poly sheeting between). If you're in the area, just search for "foam" in the materials section on craiglist. They're $10 or $12 per sheet depending on which seller it is. I use springfield and st louis. The foam is in cassville and monett.