I asked ChatGPT to draw what TOS era Borg (and a Borg cube) might look like if Gene Roddenberry had decided to have the Borg on TOS. I was impressed with what it came up with.
Borg cube:
Borg drone (I don't know why it actually says "Star Trek" on his chest but when I asked for it to draw me a TOS Borg drone I typed in "
draw a borg drone if the borg had shown up in star trek: the original series (as opposed to star trek: the next generation borg). make it look like it was something the budget of a 60s sci fi show could afford":
In actual ST canon, I can imagine that early Borg cubes and drones looked a lot like these pictures.
Those look cool and that cube would make an amazing 3D print