[NostalgiaRadioTime]

Art, I have been faced with the same problem on several projects.... having nice, untorn original grill cloth, but either it was badly faded or badly stained or both. My 1936 model 630 has similar grill cloth, and while it wasn't as badly stained as yours, it did have numerous white paint streaks down it and was faded to a dull grey. Looked awful. So, not being able to find suitable reproduction grill cloth, I did something that may be jaw dropping to some purists... I lightly spray painted the cloth. Gold. Cadillac gold to be exact. Here is the result:

   

Actually, the gold grill cloth compliments the gold PHILCO decal. I'm happy with how it turned out.

Here's the paint I used:

   

I borrowed this spray can from my dad, who used it to paint the engine on his 1956 Plymouth Fury