I have a 93 Chevy camper van G20. On the dog house there is an ac/ heater duct on the left and right of the dog house. I am missing the right side. It is discontinued thru Chevrolet. The part# is 15621540. If anyone has one I would be willing to buy it at a reasonable price. Junk yards want to sell me the whole housing which I don't need. Thanks in advance.