Wephota buys master rolls and cuts the film. Current NP22 is Fomapan 100.
You can ask Wephota directly:
d.grohmann@bg-wernigerode.de
http://www.wephota.de/fotogra.htm
Don't know if he speaks english.

The advantage of Wephota is that you can get the emulsions in all sizes, even custom sizes.
http://www.wephota.de/down/wephota/wepr.pdf