[Origami] Metric paper cutter/ trimmer?

[sarah northshield]

Hi folks!
I’m looking for a metric, gridded, guillotine-style paper cutter and am
having a tough time! There are plenty in the US that have both imperial and
metric, but the grid lines follow just the imperial measurements (metric is
usually a single line of measurement at either the top or middle of the
board). I’ve seen metric slide cutters, but I prefer guillotines. Anyone in
the US know where I may find such an elusive thing, please?
Many thanks, and Happy New Year + a week!
-sarah