Answer:
DS9072 in all forms, including DS9072H-40R has been obsolete for over 10 years with no replacements and no upgrades, and no known industry 2nd sources or similar parts.
There is no replacement or industry replacement for the DS9072 connector. The only option for DS2250 users of this socket is to consider soldering pins on. The customer or their assembly house may have some ideas for other mounting techniques.
You will need to have headers (wires) at 0.05" pitch spacing and 20 positions (two sets) to solder the DS2250 to the PC board.
20 pin male header (soldered to the DS2250 PCB edge pads like detail “F” picture below)
https://www.harwin.com/products/M52-040023V2045/
20 pin socket connector (soldered to PCB)
https://www.harwin.com/products/M52-5002045/