Directly terminating ribbon cable to a board with an insulation displacement connector fell out of favor over 20 years ago.
I don't think that's what the OP's connector is. It's a DIN 41612
plug, which mates into the board-mounted female DIN 41612
socket.
I thought DIN 41612 was still widely used. DigiKey and Mouser both show a wide selection of DIN 41612 parts, including IDC connectors. AGRAIL, what makes you think your part is discontinued??