OK... I went to Town North today and got a new Bellypan. They had the parts screen turned so I could see all of the costs. Here is what I saw:
Description: Cover, Und.
Part No: NA01-56-111F
Cost: 36.05
List Price: 63.11
TDR Price: 51.06
They said that they had only one in stock, and I bought it. If you want one, I suggest you call ahead to check the inventory before driving down there.