I got a little obsessed with finding some period-appropriate carbon composition resistors. I tried various sources, even ordered some that turned out to be the more modern peanut-shaped style.
I eventually discovered that a Japanese company until recently made some quite satisfactory ones (until they were bought by Ohmite), and you could still find those via audiophile sources, as well as some NOS Allen-Bradley stock.

I got these via a Canadian company :
https://partsconnexion.com/resistor-carbon-composition/?_bc_fsnf=1&Watt=0.25W
They look so ..... well ... Retro! :)
Hey,
Those look great. Very period authentic.
I think I would like to use Artem's replica Mark-8 boards and period appropriate parts.
You must share your build with photos so we can see how it turns out.
Cheers,
Gavin.
This is great! I usually use eBay since you can sometimes find them in bulk for a good price.