Amazon.com: Mini DisplayPort to DisplayPort Cable, 3.3 Feet, iVANKY 4K@60Hz / 2K@144Hz Mini DP to DP Cable, Thunderbolt to DisplayPort Cable Compatible with MacBook Air/Pro, Surface Pro/Dock and More - Space Grey :
This $15 iVanky DisplayPort cable allows you to connect a 4K monitor 10ft away - Pureinfotech