Black + Mesh and Two Tone + Mesh is standard.
The aluminum panel and glass panel are sold separately as accessories. Both will make temperatures worse, so I don't want to make them default or configurable. I don't endorse worse performance, feels sacrileges.
Thanks for the reply and information. I agree that performance should come first, I just had hastily assumed that a silver mesh for the two tone was easier to produce than the black one, my bad. Still looking great nonetheless.