Yesterday i went out and i couldnt find that thermofoam anywhere.I went to rocket and bought some stuff called thermo-mat.Its foil on both sides with what looks like fibreglass matting in the middle.Cost me $50 for a 120cm square sheet of it.Anyway i measured it up,cut it out and put it in the CAI.Havent really driven it much since then but surely it would do something.