DELOCK 62638: mini Displayport 1.2 male screw > DP-female 4K at reichelt elektronik
kenable DisplayPort HQ Locking Video for TV Monitor PC Laptop Cable...
rhinocables Display Port to Displayport Cable, DP to DP cable with Secure Gold-plated Locking Connectors, Standard Lead for Gaming Monitor, HDTV, PC, and Graphics Card (1m): Amazon.co.uk: Computers & Accessories
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C2G Locking DisplayPort Cable (15') 54403 B&H Photo Video