I am looking for the retainer rod that holds the heater box up to the cowl on the passenger side of my 69 Dart. This is the rod that runs up through the box behind the fresh air vent. I believe it is sometimes referred to as a J-hook. Somehow the one for my box is missing, which explains why the moisture was leaking into the passenger floor board and why there was a terrible draft in the car. If you have on lying around, let me know. Thanks.