On the fabrication front, I guess I leaked a convertible aspect of this install here:
https://www.caraudiojunkies.com/showthread.php?p=71981
But anyway - all that shopping and at least I've made pre-templates so I can make the two templates I need for my three panels (one amp rack, two swappable sub box). These will allow me to get the so the recesses and holes drawn uniform and correct.
I think I'm going to like that mechanical industrial aesthetic beyond the functionality it's really being used to mask - it suits the robot look of this Civic.
Now I'm back to thinking maybe I will find somewhere to use this hex-mesh plastic I picked up - it matches the Civic hatchbacks fake bumper vents, and that industrial vibe.
We'll see.