This Module is currently available.
LED System - Blank
The module looks like a clear blank, but actually houses an LED system inside to light up your modular rack!
There are a variety of module sizes and utilities.
https://reverb.com/item/59532154-12hp-art-skull-popsicle-eurorack-3d-blank-plate-modular-synth
Beepboop Electronics Tape Line-Level