As CLD has referenced, the new grill cloth is pretty much covered, and as wildbill96 posts, while not a dead on exact match, real freekin' close. His research even gave us the choice between "NOS" or "relic" looks.
The problem is the old sparkly grill cloth and the actual OEM tolex. It seems Wendell made the original grill cloth, however current EPA regulations make it impossible to re manufacture it. Bill Swank told me if I sent a sample of the original sparkly cloth he would see what they could come up with, but I haven't pursued it.
I can't even image the effort, expense, and minimum order required to get the original tolex re manufactured
George makes me feel a little guilty for dropping the ball. The job he did getting the knobs made was superlative IMO, and probably took a lot of time and money on his part; an effort that a lot of us get to benefit from.