Nakamichi PA-7 Power cable replacement/IEC conversion question

Morning!

I've just acquired a PA-7 and it's in great shape functionally & physically, aside from the attached power cable, the outside jacket is cracking and falling apart. Of course replacing an attached power cable is not difficult, and I will likely take it to Doug at D'n'A Electronics to get the work done, but my questions are:

1. Through the cracks I can see what look like 2 solid conductor wires, plus 2 perhaps ground wires wrapped in a thin cloth material, spiralled around the conductors, maybe a custom design? Is there a specific spec power cable I need as a replacement?

2. Is it possible to convert it to IEC so that it will take an aftermarket cable? I have a Pangea AC-9 SE that I would love to try out with the amp.

If there are any known mods/updates to the amp worth performing while it's on the bench, I would love to know as well! For those that will ask it is the first version, not the MK 2.

Cheers,

Jaret