This Module is currently available.
6HP Blank Panel
by Isobar Industries 6HP Blank Eurorack Panel. White silkscreen on black PCB.
https://isobarindustries.etsy.com/listing/1530773735/overgrowth-1-6hp-eurorack-blank-panel
These merchants probably sell this module. Huh?
Included in 7 Racks, 4 are public: