From the ad:
We have been working hard since last November to bring you a swirl pattern for the Walton,.. and now, we are happy to offer you a nice beautiful duplication of this fine Zenith cloth.
It is made of Rayon and Cotton, just as the old grille cloth was in the 30s. But best of all it is "Made in the U.S.A." The weaving company worked very hard to create a cloth as close to the original as possible.
I take it from this that there are still weaving companies in the U.S.A able to make grill cloth, and ..... the price is pretty good too.....sooooo.... who are they and what other grille cloths do they make?