I haven't bought any 1.9 ounce uncoated ripstop for a couple of years but the last I bought was from here:
I also still have a couple of rolls of uncoated 1.9 ounce ripstop that I bought in the 1970s for almost nothing. I use it for first drafts. It is a very ugly color (baby crap yellow?). I bought the black fabric to please my wife and I use it for the final drafts.
Forty year old uncoated ripstop on rolls, stored inside a house, away from the sun looks and wears just like new. Not so for the coated nylon. Some of that has morphed into sticky, smelly mess.