The What: Hall Research has launched the HD-AUD-IO, an all-in-one HDMI audio manager capable of extracting audio from (de-embedding) and/or inserting audio into (embedding) an HDMI video signal.
I have an older Panasonic TC P50ST30 (release review/specs here) that was generously given to be by another Arsian that does have ARC support (I think). The TV sitting in front of an old but nicer ...