Maybe cutting with a laser? Can you score tempered glass and snap it?

It would be nice to have narrow shapton ceramic stones. It's a bummer that I feel I can't use them for screwed up blades that need a narrow hone. Just last night I started honing a new TI Super Gnome that surprise, needed a narrow hone (2nd Super Gnome that won't respond to a wide hone). I set a passable bevel on the 1&2k Shaptons and went for the edge of a Tam and very narrow Coticule with hundreds of passes on each. The edge is still not where I want it.

So.....narrow Shaptons? I'd like them. Even if only for coarse grits to finish on narrow natural stones.

Here's an alternate idea for you, Alex:

The 1K is about $43 + shipping. If you spring for the cost and your idea works and....you think you'd be fine with offering to sell ripped Shaptons, I think it would work in your favor. I could see myself buying a ripped 1K Shapton for let's say $40 shipped and I bet some others would as well.

Chris L