This also might be a bit far out, but I am also getting a sample piece of a white 1050 ballistic nylon fabric. I have read they used a dyed ballistic nylon with the herringbone pattern screen printed on. I figure if I like the nylon then I'll try dying it.
I've had a company screen print designs for a band I've played in, from which I know they do good work and can print on large scale fabric. So maybe if I can't find a replacement similar fabric then I'll just say screw it and go for the real deal.