I had to bring the wife shopping today and as fate would have it, she wanted to stop by Joann's fabric. I figured what the hell, might as well go in rather than sit out in the 30 deg weather. Fortunately, I had an old micrometer in the Subie's toolbox....Of the 6 bolts of pillow/matrass ticking they had on hand, one was red and the other five were blue. All had different part numbers and thicknesses varied by a couple of thousandths from 0.012 for the red, to 0.015 +/- o.oo1 for the blues. The thickest (0.018" as measured) was blue stuff that actually felt considerably stiffer and thicker than the rest.
( Made in India if memory serves.) The woman at the cutting counter said that this one particular ticking was the most popular due to it's heaviness and durability. The part number of that one is 16840183 and is priced at $10/yd. I ended up buying another yard and a half just because it seemed to leave a 1500+ patch's on the shelf for the price of a whopper lunch at Burger King. I have no idea if it can be ordered but the part number is on the attached receipt for those who follow.. Now you guys have me thinking if I should go back and buy it all...