If you didn't mind possibly having creases you could flatten the roll and then use a shingle cutter. But the cost to buy one would far outweigh just buying rolls of the correct width.
it can be done likely largest company cut roll of 2000 grit for a custom car builder friend to put on his sanding boards. Aluminum 1" thick and up to likely 3 feet long the boards. Think sales guy pulled some strings as he respected the work he saw.
Clipped on his boards not stick on. I like the 2 3/4 stick on 3M autobody paper its great in the shop even for sharpening chisels or whatever up to 550 grit.