HDMI Switch for I2S signals between DAC and Network streamer or CD-player ?

I have a network player: SMSL SD-9 with I2S HDMI outlet and a Topping DAC: D90SE with I2S HDMI inlet. I can playback DSF files nicely from a Harddisk in a HDD Docking station. I plan to buy a CD player: Shanling ET3, with I2S out, so...... I am one I2S inlet short on the DAC. I need a switch box with HDMI inlets and outlets that can do the job. Does any of you know about such a HDMI switch box ? I take it that all 19 wires/pins in the HDMI box must me connected evenly through out the switch.
There are lots of HDMI switch boxes for Video/audio on the market, but the two (one without external PSU and one with) I have tried so far do not work in this I2S context !!

 

HDMI switch boxes I know are active and actually look for signals and power, then buffer out. Like you've found out, that won't work for I2S.

Quick Google leads me to this for 2x I2S in to 1x I2S out: https://www.audiophonics.fr/en/sele...s-inout-one-out-switching-module-p-11699.html. It won't work in the other direction, but maybe you can find something like it.