i talked to mr jaguar him self bob f. and he is using some foam that is about the same as that.. it may even be that stuff just called something else. they call it P-400
anyway.. he said a 3" thick sheet 4' x 8' is about 168.00 from this place
elliott foam
9200 zoinsville rd
indianapolis, in
46268
phone: 1-800-545-1213
hope i helped