HDMI + DP PCB connector


Someone knows when I can buy the HDMI + DP PCB connector used in Jetson NX carrier boards?
I see its BOM file and the code is 1852139-0N055T-H

I contacted with the manufacturer, ASTRON, but they sell the connector for big quantities, not for units. So, I want to know if someone knows where I can get some of them.
I search in alliexpress, digikey and mouser, but I had not success.

Thank you for your help.