For sale is 20 yards of 30D grey silnylon.  I bought this directly from Oware last year.  Details below

“Silicone Coated Nylon Ripstop 30 denier Type 66 nylon Good for tarps, bivysack bottoms, ponchos, rain chaps, and stuff sacks linear yards 1.35 oz per square yard. These 2nd are fully functional but may have spots or streaks of extra coating.”

$59 shipped for all of it.