I'd just doubt you can find them on their own is all, at least not without some technical specification that if other brands utilized that it may be known by at the wholesale level or something....just doubt they're available as a consumer purchase generally.
I just meant that in the general world of audio components used in higher fidelity audio systems, like your Sony receiver, have no use for such proprietary connectors but rather used more generalized ones that many components share or can use or adapt to. TrueHD is a Dolby lossless codec.