I am trying to get replacement parts for my Harman P61 in case of breakdown in the winter. I don't want to have to use oil even for 1 day so I want to have parts ready. Does anyone know the part numbers for a combustion motor and convection blower that will work in a P61 from grainger? Also if anyone knows where to get a Harman control board older one no dip switches for a P61? The onlt one I could find was like $250 no way I want to pay that much.