[rhubarbtse]

Male 262 degrees 8 pin DIN connectors (for C64 video cables etc) are readily available from for example AliExpress.

Couldn't find any female connectors (for the motherboard) though.

[pezezin]

If I am not mistaken, it is the same connector as the one used by the Sega Megadrive 1, although with a different pinout. In principle, you should be able to get a Megadrive cable, cut it, and reorder the pins.

[Suppafly]

They seem readily available until you try to actually order them. Everywhere that sell electronic components has an entry for them still but has no actual stock.