This Module is currently available.
Blank/blind panel. To be used for DIY modules and as a safety fill in to a case.
https://www.ctrl-mod.com/collections/blank-blind-panels/products/blank-panel?variant=17269685189
These merchants probably sell this module. Huh?
Endorphin.es GHOST FACEPLATE PANEL
Instruo Blank Panel - 8HP
MSL Blank Panel 12HP White
Instruo Blank Panel - 12HP
Instruo Blank Panel - 4HP
Instruo Blank Panel - 10HP