I recently bought a Nac 82 with a very damaged rear sticker. I’d like to replace it with another. Naim told me they don’t have replacements and an email (and follow up) asking if they had a template or drawings they could photograph and send me so I could get my own made up have remained unanswered after a fortnight.
I would leave it be. You will hardly ever see the back of the unit.
If you need to know what each socket is for, look online for a manual. If you really, absolutely want to make a new sticker, again, look online for images of the sticker in question, and go from there.