I get most of my paper from folks on here that send me paper from rolls they develop. You can buy it new from Shanghai in China, however their 127 paper was horrible so I don’t expect their 120 papers to be any better.
I know that
@Light Lens Lab is currently setting up a manufacturing line for new paper, but they haven’t made much paper yet, and idk if they’ll sell paper in bulk. But they are the only other place I know that makes if besides the big film companies and Shanghai.
I have cut my own 220 backing paper from big rolls of Soviet red paper from Astrum, but that is very time consuming.