Fireproof growboxes in between pc case & cabinet size?

[dymaxion grow]

Does anybody have suggestions on finding a fireproof(metal?) growbox that's larger than a pc case but smaller than a cabinet?

I'm looking for something around 30 inches tall, 2 foot wide and 2 foot long.

 

[HuffnPufferfish]

u bar metal frame with drywall, easy