Made a fellow Minoxer, Jimmy Li, and probably still available (or not). A steel machine, using sharp superimposed rollers for cutting the film negative, from 35mm stock down to 2 x strips of 9.2mm. Very well made, and very sturdy. It will last a long, long, long while.
The strips of 9.2mm film are neat, without rough edges, straight and unscratched. You can read my review of this cutter here, if you want to. I do not sell this item, so please do not send me message on how can you buy one.