Amazon.com: VPFET HDMI Audio Extractor 4K HDMI to Optical 3.5mm AUX Audio Adapter Splitter Converter Supports HDCP Dolby Digital DTS 5.1 PCM : Electronics
Oenbopo HDMI Audio Extractor HDMI to HDMI + Optical TOSLINK SPDIF + Analog RCA L/R Jack Stereo Audio Video Splitter Converter Support 4K Full HD1080p - Walmart.com
Amazon.com: Tensun 4K HDMI to HDMI Optical SPDIF TOSLINK Converter Adapter with 3.5mm RCA R/L Stereo HDMI Audio Extractor Splitter for Blue-ray PC Laptop Xbox One HDTV : Electronics
60M True 4K HDMI Active Optical Cable (True 4K@60m) - VE7834, ATEN Video Extenders | ATEN Corporate Headquarters
HDMI 2.0 Active Optical Cable - 50m | Black Box
3 Meter (9.84 FT) HDMI Cable with 10FT Toslink Audio | Computer Cable Store
15M True 4K HDMI Active Optical Cable (True 4K@15m) - VE7832, ATEN Video Extenders | ATEN U.S.A.