Factory fuel tank carpet

[bhemingson]

I am in the process of fixing the rust in the cab of my 1972 Sierra Grande. The fuel tank is covered in a blue carpet that kind of looks like the old indoor/outdoor. It has the same white foam material that was under the sound deadening on the cab floor so I'm thinking this might be stock. It's intact but a little dirty. Is this factory and do the make replacements? I'd post a pic but the site says I have a security issue with pics from my phone.