This Module is currently available.
6hp Blank from markt modular
Available from
https://www.signalsounds.com/modular?in-stock=1&manufacturer=193
https://www.perfectcircuit.com/catalogsearch/result/?q=markt
http://www.boutiquepedalnyc.us/markt-modular-blank-panel-set-6hp-8hp-10hp-12hp/