I used similar connectors in project. Can use Aluminium or Acrylic (or an old XLR-Patchpanel).
Hole pattern looks like this (is in Millimetre):
I checked Neutrik](https://www.neutrik.com/) and [Cliff]](CLIFF Electronic Components and connectors,jack sockets,XLR,RCA,USB.) but neither got this mystical TRRRS style 4.4mm connector. It is all Alibaba or headphone cable makers.
To quote Zeos: “Proprietary as fuck!”