That is the exact one, but i wasn't able to get it from Molex:
But with the part number, i was able to find it on the net.
Pitch size and so, you can find in the PDF from the above Molex link
If you don't have a C65 Keyboard, you don't need it at all, then the C64 Keyboard connector is sufficent.
One last hint: (not sure how good your soldering skills are) Better order 2 ATmegas directly.
I have needed two attempts to get the ATmega soldered properly to the PCB...