76 NYB aftermarket question.

Supposedly just north of me there is a 1976 NYB coupe for sale. I'm just a little suspicious of the sellers wording. All original, 440, very little rust, and new aftermarket plastic gas tank.

I probably know the answer to this question but I just have to ask. Anyone know of a aftermarket plastic gas tank for a NYB? Please tell me this is a thing, and not just running off a can.
Author: King Hooter