A lot of discussions have focused on DisplayPort 2.0 lately but what is DisplayPort 1.4? It is the previous standard that may be well suited for your needs.
Rocstor DisplayPort 1.4 Cable (3') Y10C281-B1 B&H Photo Video
DisplayPort 1.4 Pro AV/IT Integrator Series™ Certified 8K Cable with ProGrip™ 15ft
CableDeconn DisplayPort 1.4 to HDMI 2.1 Ultra HD 8K Male to Female Cable 0.25m Converter 8K@60Hz 4K@120Hz Directional Compatible with DisplayPort PC and HDMI Displays Tvs A0101-Diplayport 1.4 8K-CableDeconn
DisplayPort 1.4 Vs. 1.2 – Which is Better? - GamingExpert
Displayport 1.4 Cable (8K Compatible) – BitWare Store
Tripp Lite DisplayPort 1.4 Cable with Latching Connectors - 8K UHD, HDR, 4:2:0, HDCP 2.2, M/M, Black, 10 ft. - - P580-010-V4 - Monitor Cables & Adapters
DisplayPort 1.4 Video Cable - 8k@60Hz
DisplayPort 1.4 to HDMI 2.1 adapter cable - 1.8m - 8K/60Hz – KabelDirekt
Uni-directional 8K 60Hz Displayport 1.4 to HDMI 2.1 Cable 4K 120Hz – CABLETIME