Source for HDMI 2.1

[gofast]

Hi All.
Can someone please give me the name of any firms or suppliers that can provide a true HDMI 2.1 cable about 14 feet long.
HDMI 8k @ 69, 4k at 120; 48 Gbps. ( not sure whether HDMI.org description for "Ultra Certified Cable or Ultra high speed HDMI" cable is material.)

Cable will be installed In-Wall professionally thru a slightly difficult path. So I don't want to have to run another line later and need to future proof now.

Will place order for a 2020 likely an LG oled 65GX which will need some slight site prepping. Until true 8k programming is available in future. T

Already have a temporary 2019 LG 55C9 with audio played via eARC to current receiver and pair of Sonus Fabers; and recently released 50 Pioneer KURO signature monitor plasma.
Any help or leads much appreciated.
Bob