Hyundai OEM Parts Online doesn't seem to have it, and they would have only had the female connector found on the wiring harness, the male connector is directly on the gateway PCB.
While it is possible to access all busses from the OBD, the access is restricted somehow, they are only accessible if you have a OBD service dongle and software from Hyundai/Kia (costs about 4-5k), I believe the gateway also works as a router/firewall, and access is granted to all data only if a key or special command is sent to the gateway. The car has 5 separate CAN busses in total, and that connector I am searching is were they are all connected on the gateway.
The good news is I got the Alibaba seller, I had found them from, to sell me only 10 sets. But it would be nice to find a distributor that sells them anyway, in case someone else is also interested, the project this is going to be used is Open Vehicle Monitoring System, an open source EV tracker, remote metrics and control system.
Oscar