Used NVIDIA Quadro K1200 4GB 512SP GDDR5 Mini DisplayPort Professional Graphics Card - AliExpress
Amazon.com: Epic IT Service – Quadro K1200 Workstation Card, 4GB GDDR5, Both Half and Full Brackets, and 4 x mDP to HDMI adapters, 4K @60Hz Resolution (1 Year Warranty) : Electronics
PNY Quadro K1200 VCQK1200DP-PB 4GB 128-bit GDDR5 PCI Express 2.0 ATX or SFF Workstation Video Card for DisplayPort - Newegg.com
PNY Quadro K1200 Graphic Card - 4 GB GDDR5 - Low-profile - Single Slot Space Req - Newegg.com