It would not surprise me if Wittner-Cinetec have the capability to do this, but remember that this supplier is mainly a supplier of motion picture film, their film perforation/cutting machine more than likley can cut it to the required width, but they probably havnt pursued the path of packaging 120 film (yet) until they get considerable requests for 120 format, then maybe they will look at this.

I will flick them an email regarding this when i send them my sample shots this week, remember that they will be reading this thread closely even if they dont post on here.