Jeremy S Cook from the tindie.blog featured an article talking about the Auto Optical Audio Switch from Beni Skate. Currently being made by Beni Skate (or wait-listing if sold out). This device allows users to connect multiple audio sourced inputs or outputs, in via SPDIF or Optical Toslink much like a gscart or gcomp switch would do. Furthermore Mr. Skate’s device can come in different options if you contact him.
Be sure to check out Mr. Cook’s blog entry on this device. He did a good summarization of this device and what his needs are for it using it in his setup. If you are a bit crazy on the audio side of things like myself, give this one a check.
Mr. Cook’s Article https://blog.tindie.com/2019/01/auto-optical-audio-switch/
Mr. Skates Page https://www.tindie.com/products/Beni_Skate/automatic-spdif-opticalrca-audio-switch/