Stopped at Costco today and was offered a softtop?

[PGG]

A guy noticed me in my 72 K5 today and asked if I had a soft top.
I said no I have two hard tops.
He said I have one for sale never been installed with the frame if you want one.
I asked who made it and he said Chevy.
I thought the soft tops were all aftermarket?
Regardless if he gives me a deal how do I make sure its for my truck
not something else or a 73-75?
He sent me an image and said it is as new.
I would need to go see in person but wanted to fact check made by Chevy first?
He said he got it in a surplus purchase on a pallet with a bunch of stuff.

Thanks PG