Ugreen HDMI to HDMI Converter with Optical Toslink SPDIF and 3.5mm Stereo Audio Port, Male to Female HDMI Adapter Supports 4K 2K Video 40281 - Newegg.com
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Tripp Lite 4K HDMI Audio De-Embedder/Extractor with TOSLINK, RCA and 3.5 mm Stereo Output, 5.1 Channel, HDCP 2.2, 4K 60 - P130-000-AUDIO2 - Audio Equipment - CDW.com
PROZOR HDMI Audio Extractor Converter HDMI to Optical Toslink SPDIF with 1M HDMI 1.4 Cable and 3.5mm Stereo Audio Splitter Adapter Support 4K x 2K 3D - Newegg.com
Kanex Digital Audio Adapter for Apple TV
Mini DisplayPort to HDMI with Audio Mini DP+USB+Toslink to HDMI Adapter for Macs | eBay