Plane Jane is out of the barn again

[Ilike 72"s]

It's been a long time. I parked Plane Jane in the barn about 7 years ago. Mice found their way in. The chewed through the heater flap (door) that's inside the metal section controlled by one of the cables. It's the non /ac metal section right behind the glove box and above the passenger foot.
I cant find a replacement. Have they been discontinued?
Dennis

P.S I have removed ALL the interior to clean up after them.