...except I wouldn't have thought this one was so strange.

Basically I have a customer who needs to output audio to multiple TVs in a classroom simultaneously. I'm fine with any kind of connector at this point, since it seems to be something difficult to find, but I wouldn't have to adapt if it used 3.5mm stereo connections.

I've already checked Monoprice and chatted with their technical support but they claim not to sell such a device. Any ideas?