https://dynacomcorp.us/product-category/blank-panels/
Blank Panels – Dynacom
blank panelsdynacom
https://sfbay.craigslist.org/sby/lbg/d/santa-clara-electrician-needed-to/7929982900.html
Electrician needed to install dead plates and blank panels in breaker box - labor gigs - craigslist