Have you looked at DACs at all? Not sure if they would offer you a solution, but they act as an independent sound card and some of them have multiple options for out. May give you some options to daisy chain some stuff!
Or maybe..
Micca OriGen G2 High Resolution USB DAC and Preamplifier - 24-Bit/192kHz PCM
https://www.amazon.ca/dp/B01N14SY65/..._n9K.DbNHE0BGS