Audio Embedder with Loop Out

I need to embed 4 channel audio into an SDI signal. This by itself is not a problem, but I need to do it several times and I am running out of audio outputs on my mixer. Does anyone know of an SDI audio embedder that provides a "loop out" for audio that could be fed to a second audio embedder for a different SDI signal?

take a audio splittbox or aux from the mixer to a second embedder.

I have yet to see an embedder that offers audio loop thru. you could probably get away with simply bridging the connections between embedder inputs, but the proper way would be to DA each audio signal to get multiple outputs for your embedder units.