I use one like this https://www.amazon.co.uk/HQ-3-Way-S...958027&sr=8-5&keywords=passive+audio+switcherCan you provide a link to an example? All the switches I found have only toslink inputs. Also, I don't think the passive audio SPDIF inputs will fit my digital coax plugs (I might be wrong on that?).
It's a stereo analogue switcher, but I just use one channel.
I also have one of these, with the same effect.
https://www.amazon.co.uk/SDS-Switch...48958159&sr=8-3&keywords=4+way+audio+switcher
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