I am trying to find a “very small part” for an old Coleman Gas Furnace Model 7956-C-856. The part number and name of the part is as follows: Seal Plate SI-7945-166. I hope someone out there knows where I can find this. The heater works fine, but you really need this seal. Thank you. Please contact me at [email protected] if you have info on this part. I have called every furnace parts places for mobile homes I can find and no luck!