I've seen them on here, and ebay but I can't find the darn things now. Does anyone know where you can get those inserts to put in the grille to block off air flow and keep some heat in this beast in the 10 degree weather we are getting. I drove it to get a haircut this AM and froze. The temp never went over 140, except when I let it sit and idle for a while, then it came up to 190 and made good heat.