In addition to what was listed here.
Bergantino NXT410-C is vertical staggered.
Bag End made a vertical staggered cab as well.

Bergantino NXT410-C is vertical staggered.
Bag End made a vertical staggered cab as well.
@agedhorse seems like this one keeps popping up on TB… you know I’d buy two…For what it's worth, I've made a study about cab modularity. All Mesa Subway cabs share the same width except the 410.
Andy could make staggered 410, that one could combine with any other Subway, but you can already stack 2x210 for roughly the same result.